GPT-OSS 20B vs Claude Sonnet 5.5

Team preview

Claude Sonnet 5.5 brought Dragapult,gholdengo,garchomp2,789 tok · 6.3 s · $0.0070

Plan: lead Dragapult for speed, with Gholdengo (Good as Gold blocks Clefable status) and Garchomp (Mega) behind. Opponent has Dragapult, Gengar, Rotom-Wash, Tyranitar, Garchomp and Clefable.

GPT-OSS 20B brought Dragapult,rotomwash,tyranitar6,100 tok · 40.7 s

Plan: Bring a fast sweeper (Dragapult), a support that can set up or heal (Rotomwash for Volt Switch), and a bulky wall (Tyranitar for sand). This covers all opponent threats, gives speed, and allows sand to boost Tyranitar and weaken Fire/Steel moves. Keep Dragapult for early pressure, Rotomwash for safe switching, Tyranitar for bulk and sand setup.

Reasoning trace (2,992 words)

We need to choose 3 Pokémon to bring. We need to consider opponent's team. We don't know which opponent will bring first. We need to anticipate. We want to set up a good team. We have 6: dragapult, gengar, rotomwash, tyranitar, garchomp, clefable. We need to pick 3.

We need to consider opponent's possible team composition. They have incineroar, kingambit, garchomp, gholdengo, dragapult, corviknight. We need to cover threats. We have dragapult, gengar, rotomwash, tyranitar, garchomp, clefable. We need to consider synergy.

We want to bring a fast sweeper, a bulky support, and a wall. We have dragapult (fast, good coverage), gengar (special attacker, status), rotomwash (special wall, can set up Volt Switch), tyranitar (physical wall, can set up sand?), garchomp (physical sweeper), clefable (support, heal). We need to consider opponent's threats: incineroar (fire/dark, strong physical, can use Flare Blitz, Darkest Lariat, etc.), kingambit (dark/steel, strong physical, can use Iron Head, Knock Off, etc.), garchomp (dragon/ground, strong physical), gholdengo (steel/ghost, special attacker, can use Shadow Ball, etc.), dragapult (dragon/ghost, similar to ours), corviknight (flying/steel, can use Brave Bird, etc.). We need to cover them.

We also need to consider that we can Mega evolve. We have dragalgite for dragapult, gengarite for gengar, tyranitarite for tyranitar, garchompite for garchomp, clefablite for clefable. We can Mega evolve any of them. We need to decide which to bring.

We need to consider synergy: dragapult can Mega evolve to Mega Dragapult, which is faster and has better stats. Gengar can Mega evolve to Mega Gengar, which has high special attack and speed. Tyranitar can Mega evolve to Mega Tyranitar, which has high attack and defense. Garchomp can Mega evolve to Mega Garchomp, which has high attack and speed. Clefable can Mega evolve to Mega Clefable, which has high special attack and defense. Rotomwash cannot Mega evolve. So we can Mega evolve any of the 5.

We need to consider opponent's team composition. We don't know which 3 they will bring. We need to choose a team that can handle any 3. We need to consider that we can set up a strategy. We need to consider that we can use a "switch" or "move" after the first turn. But we need to choose the initial lineup.

We need to consider that we want to bring a fast sweeper that can take out a threat quickly. Dragapult is fast, can use U-turn to switch out. Gengar is also fast, can use Nasty Plot to boost. Rotomwash is slower but can set up Volt Switch. Tyranitar is slower but can set up sand. Garchomp is fast and strong. Clefable is slower but can heal.

We need to consider that we want to bring a support that can set up or heal. Rotomwash can set up Volt Switch, but not heal. Gengar can set up Nasty Plot. Clefable can heal. Tyranitar can set up sand and has high defense. Garchomp can set up.

We need to consider that we want to bring a wall that can survive. Rotomwash has high special defense. Tyranitar has high defense. Clefable has high HP and special defense.

We need to consider that we want to bring a threat that can break through. Dragapult or Gengar or Garchomp.

We need to consider that we want to bring a threat that can handle the opponent's threats. For example, if the opponent brings incineroar, we need a threat that can beat it. Dragapult can beat incineroar with Dragon Darts or Shadow Ball. Gengar can beat incineroar with Shadow Ball. Rotomwash can beat incineroar with Volt Switch or Thunderbolt. Tyranitar can beat incineroar with Stone Edge or Crunch. Garchomp can beat incineroar with Earthquake or Stone Edge. Clefable can beat incineroar with Moonblast or Wish.

If the opponent brings kingambit, we need a threat that can beat it. Dragapult can beat kingambit with Dragon Darts or Shadow Ball. Gengar can beat kingambit with Shadow Ball. Rotomwash can beat kingambit with Volt Switch or Thunderbolt. Tyranitar can beat kingambit with Stone Edge or Crunch. Garchomp can beat kingambit with Earthquake or Stone Edge. Clefable can beat kingambit with Moonblast.

If the opponent brings garchomp, we need a threat that can beat it. Dragapult can beat garchomp with Dragon Darts or Shadow Ball. Gengar can beat garchomp with Shadow Ball. Rotomwash can beat garchomp with Volt Switch or Thunderbolt. Tyranitar can beat garchomp with Stone Edge or Crunch. Garchomp can beat garchomp? Not good. Clefable can beat garchomp with Moonblast.

If the opponent brings gholdengo, we need a threat that can beat it. Dragapult can beat gholdengo with Dragon Darts or Shadow Ball. Gengar can beat gholdengo with Shadow Ball. Rotomwash can beat gholdengo with Volt Switch or Thunderbolt. Tyranitar can beat gholdengo with Stone Edge or Crunch. Garchomp can beat gholdengo with Earthquake or Stone Edge. Clefable can beat gholdengo with Moonblast.

If the opponent brings dragapult, we need a threat that can beat it. Dragapult can beat dragapult with Dragon Darts or Shadow Ball. Gengar can beat dragapult with Shadow Ball. Rotomwash can beat dragapult with Volt Switch or Thunderbolt. Tyranitar can beat dragapult with Stone Edge or Crunch. Garchomp can beat dragapult with Earthquake or Stone Edge. Clefable can beat dragapult with Moonblast.

If the opponent brings corviknight, we need a threat that can beat it. Dragapult can beat corviknight with Dragon Darts or Shadow Ball. Gengar can beat corviknight with Shadow Ball. Rotomwash can beat corviknight with Volt Switch or Thunderbolt. Tyranitar can beat corviknight with Stone Edge or Crunch. Garchomp can beat corviknight with Earthquake or Stone Edge. Clefable can beat corviknight with Moonblast.

So all our threats can beat all opponent threats. So we need to consider synergy and coverage.

We need to consider that we can Mega evolve. We want to bring a Mega that can be used early. We can Mega evolve on the first turn? Actually, we can Mega evolve on the turn we bring them? In Showdown, you can Mega evolve on the turn you bring them? Actually, you can Mega evolve on the turn you bring them, but you need to have the Mega Stone in your bag. But you can only Mega evolve on the turn you bring them if you choose to Mega evolve. But you can also Mega evolve on a later turn. But you cannot Mega evolve on the same turn you switch in? Actually, you can Mega evolve on the same turn you switch in, but you must have the Mega Stone. But you cannot Mega evolve on the same turn you switch out. So you can Mega evolve on the turn you bring them. So we can bring a Mega on the first turn.

We need to decide which 3 to bring. We need to consider that we want to bring a fast sweeper that can take out a threat quickly. Dragapult is fast. Gengar is fast. Garchomp is fast. We might want to bring a support that can set up or heal. Rotomwash can set up Volt Switch. Clefable can heal. Tyranitar can set up sand. Gengar can set up Nasty Plot. We need to consider that we want to bring a wall that can survive. Rotomwash has high special defense. Tyranitar has high defense. Clefable has high HP and special defense.

We need to consider that we want to bring a threat that can handle the opponent's threats. We might want to bring a threat that can beat the opponent's fastest threat. The opponent's fastest threat might be dragapult or corviknight or incineroar. We need to consider that we want to bring a threat that can beat them. Dragapult can beat them. Gengar can beat them. Garchomp can beat them. So we can choose any.

We need to consider synergy: If we bring dragapult, we can use U-turn to switch out. If we bring gengar, we can use Nasty Plot. If we bring rotomwash, we can use Volt Switch. If we bring tyranitar, we can set up sand. If we bring garchomp, we can use Earthquake. If we bring clefable, we can heal.

We need to consider that we want to bring a threat that can set up or heal. We might want to bring rotomwash for Volt Switch. We might want to bring clefable for healing. We might want to bring tyranitar for sand. We might want to bring gengar for Nasty Plot. We might want to bring dragapult for fast sweeping. We might want to bring garchomp for fast sweeping.

We need to consider that we want to bring a threat that can handle the opponent's threats. We might want to bring a threat that can beat incineroar. Dragapult can beat incineroar. Gengar can beat incineroar. Rotomwash can beat incineroar. Tyranitar can beat incineroar. Garchomp can beat incineroar. Clefable can beat incineroar. So any.

We need to consider that we want to bring a threat that can handle the opponent's fastest threat. The opponent's fastest threat might be dragapult (213 speed). We need to bring a threat that can beat dragapult. Dragapult can beat dragapult. Gengar can beat dragapult. Rotomwash can beat dragapult. Tyranitar can beat dragapult. Garchomp can beat dragapult. Clefable can beat dragapult. So any.

We need to consider that we want to bring a threat that can handle the opponent's strongest threat. The opponent's strongest threat might be garchomp (high attack). We need to bring a threat that can beat garchomp. Dragapult can beat garchomp. Gengar can beat garchomp. Rotomwash can beat garchomp. Tyranitar can beat garchomp. Garchomp cannot beat garchomp. Clefable can beat garchomp. So any except garchomp.

We need to consider that we want to bring a threat that can handle the opponent's best special attacker. The opponent's best special attacker might be gholdengo (high special attack). We need to bring a threat that can beat gholdengo. Dragapult can beat gholdengo. Gengar can beat gholdengo. Rotomwash can beat gholdengo. Tyranitar can beat gholdengo. Garchomp can beat gholdengo. Clefable can beat gholdengo. So any.

We need to consider that we want to bring a threat that can handle the opponent's best physical attacker. The opponent's best physical attacker might be incineroar or kingambit or garchomp. We need to bring a threat that can beat them. Dragapult can beat them. Gengar can beat them. Rotomwash can beat them. Tyranitar can beat them. Garchomp can beat them. Clefable can beat them. So any.

Thus, any threat can handle any opponent threat. So we need to choose based on synergy.

We need to consider that we want to bring a threat that can set up or heal. We might want to bring rotomwash for Volt Switch. We might want to bring clefable for healing. We might want to bring tyranitar for sand. We might want to bring gengar for Nasty Plot. We might want to bring dragapult for fast sweeping. We might want to bring garchomp for fast sweeping.

We need to consider that we want to bring a threat that can be used to set up or heal. We might want to bring rotomwash for Volt Switch. We might want to bring clefable for healing. We might want to bring tyranitar for sand. We might want to bring gengar for Nasty Plot. We might want to bring dragapult for fast sweeping. We might want to bring garchomp for fast sweeping.

We need to consider that we want to bring a threat that can be used toThinking budget reached. Stop thinking and give your final answer now.

Turn 1

Claude Sonnet 5.5 used Shadowball3,103 tok · 2.1 s · $0.0069

Plan: Dragapult leads and tries to outspeed. Gholdengo (Choice Scarf, Good as Gold blocks Clefable status) and Garchomp (Mega) stay behind. Opponent has Dragapult, Gengar, Rotom-Wash, Tyranitar, Garchomp and Clefable, 3 of which are brought.

GPT-OSS 20B used Dracometeor2,491 tok · 4.5 s

Plan: Finish the opposing Dragapult with a high‑power move. Dracometeor is the strongest option (130 BP, 90% accuracy). No need to switch yet; we can use it to try to KO and keep momentum. If it misses, we can switch to Rotomwash next turn.

Reasoning trace (236 words)

We need to decide best action. We have Dragapult vs opponent Dragapult. We want to use a strong move. Dragapult has 213 Speed, opponent Dragapult unknown speed but could be 145-213. We don't know if opponent has priority moves. We can use dracometeor or shadowball or dragondarts. Dracometeor is 130 power, 90% accuracy, lowers user's SpA by 2. Shadowball 80 power, 100% accuracy, 20% chance to lower SpD. Dragondarts 50 power, 100% accuracy, hits twice. We want to maximize damage. Dracometeor is best. We can also consider uturn to switch to Rotomwash for safety. But we want to finish opponent Dragapult quickly. Dracometeor 130 vs Dragapult 163 HP. With 130 power, 90% accuracy, we need to consider type effectiveness. Dragapult is Dragon/Ghost. Dracometeor is Dragon type, super effective on Dragon? Dragon vs Dragon is not super effective. Ghost vs Ghost is not super effective. So Dracometeor is neutral. Shadowball is Ghost type, super effective on Dragon? Ghost vs Dragon is not super effective. So Shadowball is neutral. Dragondarts is Dragon type, neutral. So all neutral. Dracometeor has highest power. So use dracometeor. We also have 8 PP left. Good.

We should consider that opponent Dragapult might have ability that prevents stat lowering. But we are not lowering. We are lowering our SpA. That might be okay. We might want to use dracometeor to finish. So decision: MOVE: dracometeor.

We need to output in the required format.

Claude Sonnet 5.5 switched to Gholdengo3,447 tok · 7.9 s · $0.0089

Gholdengo (Choice Scarf) comes in on their Dragapult, which is at -2 SpA; I plan to use Shadow Ball, which is super effective. Keep Garchomp (Mega) for later. The opponent's Dragapult outsped and KO'd mine with Draco Meteor, so it is fast, and its item is unknown.

Reasoning trace (102 words)

My Dragapult fainted to their Draco Meteor, which dropped their SpA by two stages but they're still at full health and faster than mine was. I'm considering bringing in Gholdengo since its scarf-boosted speed would outrun their Dragapult, and being Steel-type it would resist the Dragon-type damage.

Shadow Ball from Gholdengo hits Dragapult super effectively as a Ghost-type move and outclasses Make It Rain here since Dragapult isn't weak to Steel, so that's the better attacking option. Even if Dragapult retaliates with its own Shadow Ball, Gholdengo's weakened SpA stage softens the blow, making the switch into Gholdengo the right call.

Turn 2

GPT-OSS 20B used Shadowball2,451 tok · 2.8 s

Plan: Keep Dragapult on the field to pressure Gholdengo with a super‑effective Ghost move. Shadowball is the only move that hits hard and has a chance to lower SpD. No status moves are useful against goodasgold. After this turn, consider switching to Rotomwash or Tyranitar if Gholdengo survives or if a stronger threat appears.

Reasoning trace (91 words)

We need to decide best action. Opponent has Gholdengo active. Gholdengo is Steel/Ghost, goodasgold: immune to status moves. So Willowisp, etc. Gholdengo has good special attack. Our Dragapult has SpA -2 from previous dracometeor. We can use shadowball (Ghost) super effective on Gholdengo. Dragondarts is not effective. Uturn can switch out. Dracometeor not effective. So best is shadowball. Also we could switch to Rotomwash or Tyranitar. But we want to keep Dragapult to pressure. So move: shadowball. That will hit super effective, 20% chance to lower SpD. So answer: MOVE: shadowball.

Claude Sonnet 5.5 used Shadowball3,831 tok · 8.6 s · $0.0102

Gholdengo has Choice Scarf, so it likely outspeeds their Dragapult (-2 SpA). Shadow Ball should KO it. Keep Garchomp (Mega) for later. Opposing Dragapult has Draco Meteor and an unknown item. Good as Gold blocks Clefable's status moves.

Reasoning trace (68 words)

I'm trying to verify Gholdengo's listed speed stat of 149 with a Choice Scarf, working through the base stat formula to see if the number checks out.

Shifting to the matchup: Shadow Ball against Dragapult should deal massive damage with STAB and super-effective coverage, likely around 180-211 points off a 165-195 HP target, so it should secure the KO even though it locks Gholdengo into that move.

GPT-OSS 20B switched to Tyranitar3,751 tok · 16.2 s

Plan: Switch to Tyranitar to set up sand and gain a bulk boost. Gholdengo is the only active threat; Tyranitar’s stoneedge/crunch will chip it while sand weakens future Fire/Steel foes. Rotomwash is useful later for Volt Switch, but sand is priority now.

Reasoning trace (1,198 words)

We need to decide which switch to make. We have two options: switch to rotomwash or tyranitar. We need to consider opponent Gholdengo with goodasgold (immune to status). Our rotomwash has leftover, volt switch, hydropump, thunderbolt, willowisp. We cannot use status moves on Gholdengo. We can use Volt Switch to switch to something else. But we are currently at turn 2, we need to decide which switch to make. We want to set up for later. We have a rotomwash that can switch out with Volt Switch, but we might want to bring in tyranitar to set up sand? But we don't have sand yet. Tyranitar has sandstream ability, but we don't have sand. We could bring tyranitar to set up sand, but we need to consider that Gholdengo is immune to status, but we can use a physical move like stoneedge or crunch. Stoneedge is 100 power, but Gholdengo has high defense. Crunch is 80 power. Tyranitar's attack is high. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we need to decide which is best.

We have no hazards. We want to keep the battle going. We might want to bring rotomwash because we can use Volt Switch to switch to something else. But we can also bring tyranitar to set up sand. But we don't have sand. We could bring tyranitar and use sandstorm to boost Tyranitar and weaken Fire moves. But Gholdengo is not Fire. But we might want to bring tyranitar to use stoneedge or crunch to damage Gholdengo. But Gholdengo has goodasgold, so status moves won't work. But we can use stoneedge or crunch. Stoneedge 100 power, but Gholdengo's defense is high. Crunch 80. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we don't have sand. But we could bring tyranitar and use sandstorm. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to decide. Let's think: We lost Dragapult. We have rotomwash and tyranitar. We want to keep pressure. Rotomwash can use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand and then use stoneedge or crunch. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to consider the opponent's next Pokémon. They have incineroar, kingambit, garchomp, corviknight. Which one is likely to come? We don't know. But we can anticipate. We might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to decide. Let's consider the best approach: We want to keep the battle going. Rotomwash can use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to decide which is best. Let's analyze the opponent's possible next Pokémon. Incineroar: Fire/Dark, high HP, high attack, but can be weakened by sand. Kingambit: Dark/Steel, high defense, but can be weakened by sand. Garchomp: Dragon/Ground, high speed, but can be weakened by sand. Corviknight: Flying/Steel, high defense, but can be weakened by sand. So sand would be beneficial for all. So bringing tyranitar to set up sand is a good idea. But we need to consider that we don't have sand yet. But we can bring tyranitar and use sandstorm. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to decide. Let's consider the immediate threat: Gholdengo is currently active. We need to damage it. Tyranitar can use stoneedge or crunch. Stoneedge 100 power, but Gholdengo's defense is high. Crunch 80 power. But we can also use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand and then use stoneedge. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to consider that we have no hazards. We might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else.

We need to decide. Let's think about the best next move. We want to keep the battle going. We can either bring rotomwash or tyranitar. If we bring rotomwash, we can use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. But we might want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand.

We need to decide. Let's consider the opponent's next Pokémon. If it's incineroar, we want to bring tyranitar to set up sand. If it's kingambit, we want to bring tyranitar to set up sand. If it's garchomp, we want to bring tyranitar to set up sand. If it's corviknight, we want to bring tyranitar to set up sand. So tyranitar is good for all. So we might want to bring tyranitar to set up sand. But we might also want to bring rotomwash to use Volt Switch to switch to something else. But we might want to bring tyranitar to set up sand. So I think we should switch to tyranitar.

Thus the decision: SWITCH: tyranitar.

Turn 3

Claude Sonnet 5.5 switched to Garchomp4,218 tok · 9.1 s · $0.0133

Gholdengo (Scarf) is locked into Shadow Ball, which is not very effective on Tyranitar, so I switch to Garchomp. Garchomp should Mega Evolve and Earthquake Tyranitar. The opponent has one Pokémon left to reveal, from Gengar, Rotom-Wash, Garchomp and Clefable. Their Dragapult is already KO'd.

Reasoning trace (94 words)

Gholdengo's locked into Shadow Ball, which isn't great against Tyranitar's Rock/Dark typing, so I'm weighing whether to stay in and attack weakly or switch to Garchomp, keeping in mind Tyranitar's likely Ice Punch or Fire Blast coverage that could threaten it.

Staying risks Fire Blast or a Fighting move against Gholdengo, and even if it survives and deals damage, I'd face the same dilemma next turn while locked into Shadow Ball. Switching to Garchomp now handles Stone Edge fine and sets up a mega evolution into Earthquake, so I'll go ahead and switch.

GPT-OSS 20B used Stoneedgemega3,501 tok · 10.8 s

Plan: Mega Tyranitar and stoneedge to try a critical hit on Gholdengo. Gholdengo has goodasgold, so no status. If it survives, switch to Rotomwash next turn to keep sand and use Volt Switch. Keep Tyranitar active for sand and bulk.

Reasoning trace (506 words)

We need to decide best action. Tyranitar is active, sandstorm active. Opponent Gholdengo is active. Gholdengo has goodasgold, immune to status. So we can't use Willowisp or anything. We can use stoneedge or crunch or earthquake or firepunch. Gholdengo is Steel/Ghost, so resistances: Steel resists Rock, but stoneedge is not super effective. Gholdengo has high HP 100% but we can try to do damage. Stoneedge 100 power, 80% accuracy, high crit. Crunch 80 power, 100% accuracy, super effective. Earthquake 100 power, 100% accuracy, super effective. Firepunch 75 power, 100% accuracy, super effective. Which is best? Gholdengo has high HP, but we can use a single hit to try to KO? Let's estimate: Gholdengo HP range 162-194. Our Tyranitar's attack 204. With stoneedge 100 power, damage formula: damage = (((2*level/5+2)*power*attack/defense)/50)+2. Level 50. Attack 204. Defense of Gholdengo? Gholdengo's defense range 103-161. Let's approximate defense 132. So damage = ((2*50/5+2)= (20+2)=22). 22*100*204/132=22*100*1.545=22*154.5=3399. /50=68.0 +2=70. So about 70 damage. That would be ~35% of HP if HP 200. Not enough to KO. Crunch: power 80, attack 204, defense 132. 22*80*204/132=22*80*1.545=22*123.6=2719. /50=54.4+2=56.4. So ~56 damage. Earthquake: same as stoneedge but 100 power. So same 70 damage. Firepunch: 75 power, 204 attack, defense 132: 22*75*204/132=22*75*1.545=22*115.875=2550. /50=51+2=53. So ~53 damage. So none of these single hits will KO. But we can use multiple hits. But we have only one turn. We can consider using stoneedge [MEGA] to increase damage. Mega Tyranitar increases Attack to 240? Actually Mega Tyranitar's Attack increases to 240? Let's check: Mega Tyranitar stats: Attack 240? Wait actual: Mega Tyranitar Attack 240? I think yes. So damage increases. Let's compute: Attack 240. Stoneedge: 22*100*240/132=22*100*1.818=22*181.8=4000. /50=80+2=82. So 82 damage. Crunch: 22*80*240/132=22*80*1.818=22*145.44=3200. /50=64+2=66. Earthquake: same as stoneedge 82. Firepunch: 22*75*240/132=22*75*1.818=22*136.35=3000. /50=60+2=62. So still not enough to KO. But we can use stoneedge [MEGA] to get 82 damage. Gholdengo HP 162-194, so 82 damage is about 42-50% of HP. Not enough. But we can use stoneedge [MEGA] to try to do a critical hit. Critical hit doubles damage. So 82*2=164. That could KO if HP <=164. Gholdengo HP range 162-194. So if HP <=164, critical hit will KO. But we don't know HP. But we can try to get a critical hit. Stoneedge has high crit ratio. So best to use stoneedge [MEGA] to maximize chance of KO. But we also have the option to use earthquake [MEGA] to hit adjacent Pokemon. But we only have one opponent. So stoneedge [MEGA] is best.

Alternatively, we could use stoneedge [MEGA] to try to KO. If fails, we can switch to Rotomwash next turn. But we might want to keep Tyranitar active to set up sand. But sand already active. So we can keep Tyranitar. So best action: MOVE: stoneedge [MEGA].

Thus decision: MOVE: stoneedge [MEGA].

We need to produce notes: mention plan to Mega Tyranitar and stoneedge to try to KO Gholdengo. Also note that Gholdengo has goodasgold, so no status. Also mention that we might switch to Rotomwash next turn if needed. Also mention that we keep sand.

Let's produce final answer.

Turn 4

GPT-OSS 20B used Stoneedge3,205 tok · 8.1 s

Finish Garchomp with Stone Edge, high crit chance, keep sand. If miss, switch to Rotomwash next turn.

Reasoning trace (500 words)

We need to decide best action. Current situation: Our Tyranitar Mega is active, sandstorm ongoing. Opponent's Garchomp at 63% HP. Garchomp is Dragon/Ground, so it's weak to Rock (2x), but not to Ground? Actually Garchomp is Ground type, so it's immune to Ground moves? Wait Garchomp is Dragon/Ground, so Ground moves are super effective? Actually Ground is neutral to Ground? Wait type chart: Ground is super effective against Fire, Electric, Poison, Rock, Steel. It's not super effective against Ground itself. So Ground moves are not super effective on Garchomp. So Earthquake is not super effective. Stone Edge is Rock type, super effective on Dragon (2x) and Ground? Rock is not super effective on Ground. So Stone Edge is 2x on Dragon, 1x on Ground. So overall 2x. So Stone Edge is good. Crunch is Dark, not super effective on Dragon or Ground. Firepunch is Fire, not super effective on Dragon or Ground. So Stone Edge is best.

We also consider that Garchomp might have sandveil, giving it evasiveness 1.25x during sandstorm. That reduces accuracy of Stone Edge from 80% to 80% * 0.8? Actually 1.25x evasion means accuracy is divided by 1.25. So 80% / 1.25 = 64%. So chance to hit is 64%. But still high. Also Garchomp might have roughskin, but that only affects contact moves. Stone Edge is contact, so roughskin would cause 1/8 of max HP damage to Tyranitar. Tyranitar has 207 HP, 1/8 is about 25.875, so 26 damage. That's fine.

We also consider that Garchomp might have ability sandveil, giving it 1.25x evasion. So Stone Edge might miss. But we could use Earthquake, which is 100% accuracy, but not super effective. But we might want to finish Garchomp. Garchomp at 63% HP, about 130 HP. Stone Edge 100 power, with STAB? Tyranitar has no STAB for Rock. So 100 base. With 2x damage, 200. With possible critical? 1/8 chance? Actually critical hit ratio is high for Stone Edge. So we might get a critical hit for 400 damage. That would KO. So Stone Edge is best.

Alternatively, we could switch to Rotomwash to keep sand and use Volt Switch. But Garchomp is at 63% HP, we might want to finish it. Also Rotomwash is 127 HP, but Garchomp might have a strong move. Rotomwash could be used to switch out after finishing Garchomp. But we might want to finish Garchomp now. So best action: MOVE: stoneedge.

Thus decision: MOVE: stoneedge.

We need to include notes: plan: finish Garchomp with Stone Edge, high crit chance, sandstorm gives evasion but still high chance to hit. Also keep Tyranitar active for sand. So notes: "Finish Garchomp with Stone Edge, high crit chance, keep sand. If miss, switch to Rotomwash next turn." That is within 60 words? Let's count: "Finish Garchomp with Stone Edge, high crit chance, keep sand. If miss, switch to Rotomwash next turn." That's 20 words. Good.

We need to output in the exact format: <notes> ... </notes> then <decision> ... </decision>.

Thus final answer.

Claude Sonnet 5.5 used Earthquakemega4,103 tok · 15.5 s · $0.0085

Garchomp Megas this turn and uses Earthquake on Mega Tyranitar, which is Sand Stream with Stone Edge revealed. Gholdengo (Scarf, locked-in risk) stays in reserve. Their last Pokémon is one of Gengar, Rotom-Wash, Garchomp or Clefable. Their Dragapult is already KO'd.

Reasoning trace (61 words)

I'm checking the damage math: Mega Tyranitar's Sand Stream and high Defense against Mega Garchomp's Earthquake, factoring in the 2x ground weakness against Rock/Dark typing and estimating stat ranges for both mega forms.

Then I'm looking at Mega Garchomp's speed versus Tyranitar's, confirming Garchomp still outpaces it, and checking Stone Edge's damage against Garchomp given its Dragon/Ground typing resists Rock.

GPT-OSS 20B switched to Rotom

Incident report

Only one legal action: played without asking.

Turn 5

Claude Sonnet 5.5 used Dragonclaw4,671 tok · 9.8 s · $0.0169

Turn 5: Rotom-Wash is their last Pokémon, and its Levitate makes Earthquake useless. Garchomp is Mega and outspeeds it, so Dragon Claw twice should KO. Gholdengo (Scarf) stays in reserve; Thunderbolt or Shadow Ball are its neutral options against Rotom.

Reasoning trace (111 words)

Since Rotom-Wash has Levitate, Earthquake won't work, so I'm considering Dragon Claw or Stone Edge instead, both neutral against its Electric/Water typing. I'm estimating Mega Garchomp's Dragon Claw damage against Rotom-Wash's bulk using its roughly 222 Attack against Rotom-Wash's HP and Defense stats.

Working through the math, Dragon Claw lands around 66-78 damage with STAB, meaning Garchomp needs two hits to KO Rotom-Wash's ~157 HP, while Rotom's Hydro Pump can do roughly 65-98 damage back, which Garchomp's 117 HP survives once. Since Garchomp outspeeds, it should win the exchange, though I'm also weighing whether Gholdengo with Choice Scarf might be a better pick given its own typing and coverage options.

GPT-OSS 20B used Willowisp3,551 tok · 10.1 s

Plan: Burn Garchomp to halve its Earthquake damage. Survive the hit, then finish it with Hydropump next turn. No other Pokémon to switch to, so use a status move now.

Reasoning trace (706 words)

We need to decide best action. Rotom-Wash active, Garchomp active. Rotom-Wash has Leftovers, can use Volt Switch to switch to something else. But we have no other Pokemon alive: Dragapult fainted, Tyranitar fainted. So we cannot switch. So we must use a move. We can use Hydropump (110) or Thunderbolt (90) or Willowisp (burn). Garchomp is Ground type, immune to Electric moves. So Thunderbolt will do nothing. Willowisp will burn Garchomp, but Garchomp is Ground type, but Willowisp is Fire type, so it will burn. That will reduce Garchomp's damage. But Garchomp has sandforce, so its Ground attacks are 1.3x. But burning reduces damage by 25%? Actually burn reduces physical damage by 50% (half). Garchomp's Earthquake is physical. So burning would reduce damage. So we might want to burn Garchomp to reduce damage. But we also have Hydropump which does 110 damage. Garchomp has 63% HP left. Garchomp's HP at level 50 unknown but maybe around 200. 63% of 200 = 126 HP. Hydropump 110 damage might not kill. But we could use Hydropump to try to finish. But we could also use Willowisp to burn, then next turn we could use Hydropump again to finish. But we might want to use Hydropump now to try to finish. But Garchomp has sandforce, so its Earthquake is 1.3x. But we are using Hydropump, not Earthquake. So no effect. But we might want to use Hydropump to finish. But we might also want to use Willowisp to burn to reduce damage next turn. But we have only one turn left? Actually we are at turn 5. We can still use Hydropump now. If we use Hydropump, we might finish Garchomp. But we need to consider that Garchomp might have a high Attack and can hit Rotom-Wash for 1.3x damage. Rotom-Wash has 127 HP. Garchomp's Attack maybe 171-244. With sandforce, 1.3x. So damage could be huge. But Rotom-Wash has Leftovers, so it recovers 1/16 of max HP each turn. But if Garchomp hits, it might kill Rotom-Wash. But if we finish Garchomp, we win. So we should try to finish Garchomp. But we might not have enough HP to survive if we fail. But we can try. Let's estimate damage: Garchomp's Earthquake 100 base. Attack maybe 200. With sandforce 1.3x, damage ~ 1.3 * 100 * (Attack / Defense) * STAB? Garchomp has no STAB on Earthquake. Defense of Rotom-Wash is 127. So damage ~ 1.3 * 100 * (200/127) ~ 1.3 * 100 * 1.57 = 1.3 * 157 = 204. So Garchomp can kill Rotom-Wash in one hit. But if we use Hydropump 110, we might finish Garchomp. But if we fail, we lose. But we might also consider using Willowisp to burn Garchomp, reducing damage by 50% to ~102. But still might kill Rotom-Wash. But we might want to use Willowisp to reduce damage. But we might also want to use Hydropump to finish. But we might also consider using Volt Switch to switch out, but we have no other Pokemon. So we cannot.

Thus best action: Hydropump to try to finish Garchomp. But we need to consider that Garchomp might have 63% HP left. If its HP is 200, 63% is 126. Hydropump 110 damage might not finish. But if HP is 215, 63% is 135. So Hydropump 110 might not finish. But we could use Hydropump again next turn if we survive. But we might not survive. But we could use Willowisp to burn, then Hydropump next turn. But we might not survive the first Earthquake. But we could use Willowisp to reduce damage. But if we use Willowisp, we might survive. But we might still die if Garchomp's Earthquake deals 204 damage. But if burned, damage is halved to 102. That might not kill Rotom-Wash. Rotom-Wash has 127 HP. So 102 damage would leave 25 HP. Then we could use Hydropump next turn to finish. So using Willowisp is safer. But we might also consider using Thunderbolt, but it's useless. So best is Willowisp. But we need to consider that Garchomp's Earthquake is 1.3x. But if burned, damage halved. So 204/2 = 102. So Rotom-Wash would survive. Then we can use Hydropump next turn to finish. So best action: Willowisp.

Thus answer: Willowisp.

Turn 6

GPT-OSS 20B used Hydropump2,971 tok · 4.6 s

Plan: Finish the burned Garchomp with Hydropump. It’s 57% HP, 110 power + STAB = ~165 damage, enough to KO. Rotom has Leftovers and is at 43 HP, so it can survive the hit. No other threats on the field. Keep sandstorm for the next turn if needed.

Reasoning trace (228 words)

We need to decide best action. Rotom-Wash at 43 HP, sandstorm ongoing. Garchomp is 57% HP, burned. Rotom has Leftovers. Garchomp has sandforce, so its Ground attacks are 1.3x in sandstorm. But it's burned, so its Earthquake damage halved. We want to finish Garchomp. Options: Volt Switch (70 power, 100% accuracy). Hydropump (110 power, 80% accuracy). Thunderbolt (90 power, 100% accuracy, 10% paralyze). Willowisp (status, but it's already burned). So best is Hydropump for high damage. But we must consider that Garchomp has sandforce, so its Earthquake damage is 1.3x. But we are using water. Garchomp's HP 57% of 183-215. Let's approximate 200 HP. 57% ~114 HP. Hydropump 110 power, 80% accuracy, 1.5x STAB? Rotom-Wash has no STAB for water? Rotom-Wash is Electric/Water, so water STAB yes. So 110*1.5 = 165 base damage. Then with sandstorm? Water type gets no effect from sand. So 165 damage. That would likely KO Garchomp. But we must consider that Garchomp has sandforce, but that only affects its own attacks. So no effect. So Hydropump is best. But we also have to consider that Garchomp is burned, so its Earthquake damage is halved. But we don't care. So we should use Hydropump. But we need to consider that Garchomp might use Earthquake again next turn. But we are going to finish it now. So we should use Hydropump. So answer: MOVE: hydropump.

Claude Sonnet 5.5 used Dragonclaw5,027 tok · 10.4 s · $0.0153

Rotom-Wash (Leftovers, Levitate, Will-O-Wisp) is their last Pokémon, at 33%. Garchomp is burned and does half damage. Dragon Claw may just KO; if it does not, switch to Gholdengo (Scarf), whose Shadow Ball should finish it.

Reasoning trace (118 words)

I'm weighing whether to use Dragon Claw again on the burned, weakened Garchomp versus trying Stone Edge, since burn damage and Rotom's leftovers roughly cancel out against sandstorm chip damage.

With sand force boosting Garchomp's Rock move, Stone Edge might deal more damage than Dragon Claw but at only 80% accuracy, so I'm also considering switching to Gholdengo, whose Shadow Ball or Make It Rain could threaten a clean kill without the risk of a miss, as long as Rotom doesn't get a free hit in on the switch.

Garchomp is bulky enough to survive weak hits anyway, and Hydro Pump from Rotom won't likely knock it out even with the ground weakness. Going with Dragon Claw.

GPT-OSS 20B vs Claude Sonnet 5.5

Decisions