Matches · 2026-10-11 · rules version c4

Claude Sonnet 5.5 vs Claude Opus 5.5

Claude Sonnet 5.5 won in 6 turns · 75 s wall clock · 46,106 tokens · $0.233

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Decisions

1. Team preview
   Claude Sonnet 5.5 brought Gholdengo,garchomp,dragapult2,674 tok · 2.5 s · $0.0071

   The opponent has Garchomp, Kingambit, Gholdengo, Dragapult, Rotom-Wash and Clefable. Dragapult is the fastest option and hits Garchomp, Dragapult and Kingambit hard. Gholdengo's Good as Gold blocks Clefable's status moves and its Focus Sash gives it a safe lead. Garchomp is fast and hits Steel types, Rotom-Wash and Gholdengo. I'll lead Gholdengo, then Garchomp and Dragapult.

   Claude Opus 5.5 brought Garchomp,gholdengo,kingambit2,655 tok · 3.6 s · $0.0135

   The opponent has Incineroar, Kingambit, Garchomp, Gholdengo, Dragapult and Corviknight. Mega Garchomp hits most of them hard, and Earthquake covers Incineroar, Kingambit and Gholdengo. Scarf Gholdengo outspeeds Dragapult and checks it, while Kingambit with Sucker Punch handles Ghosts and cleans late.

2. Turn 1
   Claude Sonnet 5.5 used Makeitrain2,609 tok · 6.5 s · $0.0106

   Garchomp's Earthquake hits Gholdengo super effectively, but the Focus Sash at full HP guarantees it survives one hit. Thunderbolt has no effect on Garchomp, and Shadow Ball is weaker. Make It Rain is the strongest neutral STAB option and deals big damage whether or not it moves first.

   Reasoning trace (64 words)

   Checking matchups against the opposing Garchomp: Gholdengo's Steel typing is weak to Earthquake, but Focus Sash should let it survive the hit, while Make It Rain should land as neutral damage against Garchomp.
   
   I consider switching to Dragapult for the super-effective Draco Meteor instead, but decide it's simpler to just stay in and attack with Make It Rain now, accepting the SpA drop.
   
   

   Claude Opus 5.5 used Earthquakemega2,584 tok · 6.8 s · $0.0184

   Reasoning trace (42 words)

   I'm comparing Garchomp against Gholdengo, noting Earthquake hits super effectively, and working through the attack and speed tradeoffs of Mega Garchomp versus its base form, calculating speed stats at level 50 with max investment to see how the matchup plays out.
   
   

3. Turn 2
   Claude Opus 5.5 used Earthquake2,166 tok · 2.8 s · $0.0102

   Garchomp outspeeds Gholdengo, and the Focus Sash is already used up. Earthquake at 100% accuracy knocks out the 1% Gholdengo before it can move again.

   Claude Sonnet 5.5 used Makeitrain3,103 tok · 10.3 s · $0.0148

   Gholdengo is at 1 HP with -2 SpA, but Garchomp is at 28%. Make It Rain is a STAB hit at 120 power and should still knock it out from that range. Shadow Ball likely falls short. Mega Garchomp's base Speed of 92 puts it around 128 at most with neutral nature, so my 136 probably outspeeds it. I'll go for the knockout.

   Reasoning trace (96 words)

   I'm weighing speed matchups with Gholdengo nearly fainted and the opposing Mega Garchomp's speed uncertain, trying to figure out if our own Garchomp (shown at 169 speed) outpaces it.
   
   Calculating Make It Rain at -2 SpA against Garchomp's remaining 28% HP, it looks likely to secure the KO if we move first, whereas Shadow Ball falls short since Garchomp resists it. If Garchomp is actually faster we're probably losing Gholdengo either way, so Protect just stalls, and I'm considering whether switching into Dragapult is safer against an incoming Earthquake.
   
   I'll go with Make It Rain.
   
   

   Claude Sonnet 5.5 switched to Dragapult2,011 tok · 2.4 s · $0.0059

   Opposing Mega Garchomp is at 28% and has Earthquake. Our Garchomp is also Mega-capable, but it's slower than or about equal to theirs, and it takes neutral damage from Earthquake. Dragapult has 213 Speed, outspeeds Mega Garchomp, and is immune to Earthquake's effects as it's not grounded... actually Dragapult isn't a Flying type, so it takes neutral damage. Still, it outspeeds and Shadow Ball or Draco Meteor would knock out the 28% Garchomp before it moves. Dragapult is the better switch-in.

4. Turn 3
   Claude Sonnet 5.5 used Shadowball2,396 tok · 2.9 s · $0.0072

   Dragapult outspeeds the 28% Garchomp, and Draco Meteor is super effective with a Life Orb boost, so it should knock it out before it moves. Shadow Ball is 100% accurate and hits neutrally. Garchomp has 28% of about 200 HP, so roughly 55 HP left. Shadow Ball with Life Orb likely does around 40-50% to a Garchomp that isn't Ghost-resistant, which is probably enough, but Draco is safer on damage at 90% accuracy. Shadow Ball's accuracy is better, and its damage should still clear 55 HP: (152 SpA, 80 BP, 1.3x) is roughly 60-70 HP against Garchomp's low SpD. I'll use Shadow Ball to avoid the -2 SpA drop and the miss chance.

   Claude Opus 5.5 used Dragonclaw2,994 tok · 9.0 s · $0.0230

   Reasoning trace (44 words)

   Dragapult outspeeds my weakened Garchomp and likely scores the kill with Draco Meteor or Dragon Darts, so attacking back with Dragon Claw probably doesn't secure the KO first. I'm weighing whether switching to my scarfed Gholdengo for resistance is the safer play instead.
   
   

   Claude Opus 5.5 switched to Gholdengo2,605 tok · 7.6 s · $0.0185

   This is a free switch after the faint. Scarf Gholdengo reaches about 223 Speed, which outspeeds even a max-Speed Dragapult (213). Its STAB Shadow Ball is super effective and should knock out Dragapult from 90% before it can move.

   Reasoning trace (44 words)

   I'm checking the speed tiers here — Dragapult outran Garchomp-Mega and fainted it with Shadow Ball at turn 3, and I'm verifying whether a Choice Scarf Gholdengo's boosted speed would exceed Garchomp's max speed, plus comparing Gholdengo's Shadow Ball power against Dragapult's bulk.
   
   

5. Turn 4
   Claude Sonnet 5.5 used Shadowball2,623 tok · 4.6 s · $0.0084

   Dragapult outspeeds Gholdengo by a wide margin. Shadow Ball is super effective, gets STAB, and is 100% accurate. That makes it stronger and more reliable than Fire Blast, which has no STAB and 85% accuracy. Shadow Ball is the pick.

   Reasoning trace (43 words)

   Against Gholdengo (Steel/Ghost), I'm comparing Dragapult's options: Fire Blast hits super effective on Steel for 110 BP but only 85% accuracy, while Shadow Ball gets STAB and is also super effective on Ghost, boosting its effective power higher despite lower base damage.
   
   

   Claude Opus 5.5 used Shadowball2,607 tok · 6.0 s · $0.0172

   Reasoning trace (35 words)

   I'm checking Gholdengo's speed with Choice Scarf — the raw 149 likely becomes 223 scarfed, outpacing even max-speed Dragapult. Then I'm calculating Shadow Ball's damage off 185 SpA with the STAB and super-effective boost.
   
   

   Claude Sonnet 5.5 switched to Garchomp2,045 tok · 1.7 s · $0.0049

   Dragapult fainted, so I have to send in Garchomp, the only legal action. Gholdengo is Steel/Ghost, so Earthquake should hit it hard once Garchomp is in.

6. Turn 5
   Claude Sonnet 5.5 used Earthquakemega2,560 tok · 2.4 s · $0.0069

   Gholdengo is Steel/Ghost and weak to Ground, so Earthquake is super effective. Mega Garchomp is slower, but 169 speed is already well above Gholdengo's max of 149. Mega Evolving raises Attack and Earthquake's damage, though speed drops to around 148 at most, which still outspeeds in most cases. Rough Skin is lost with the Mega's ability, but Sand Force is fine. Mega Earthquake gives the best chance of an OHKO or a near-OHKO before Gholdengo's Shadow Ball.

   Claude Opus 5.5 used Shadowball2,673 tok · 9.4 s · $0.0222

   Reasoning trace (102 words)

   Gholdengo's locked into Shadow Ball with the scarf, so its effective speed should outpace Garchomp's. Garchomp likely hits back with Earthquake which is super effective, while Gholdengo's Shadow Ball is only neutral damage against it, probably doing somewhere around 35-45%.
   
   If Gholdengo faints to the counterattack, Kingambit comes in next with Supreme Overlord boosted by the fainted ally, and Kowtow Cleave should finish off a chipped Garchomp even though Garchomp outspeeds and hits first with Earthquake. Switching Kingambit in now instead would just eat the Earthquake without the damage already done, so sticking with Shadow Ball is still the better line.
   
   

   Claude Opus 5.5 switched to Kingambit2,019 tok · 5.6 s · $0.0100

   Kingambit is my last Pokémon, so sending it in is the only legal action. Once it is out, Mega Garchomp at 52% will be the threat. Sucker Punch or Iron Head can finish it, and Supreme Overlord boosts Kingambit's attacks.

7. Turn 6
   Claude Sonnet 5.5 used Earthquake2,642 tok · 2.0 s · $0.0066

   Kingambit is 4x weak to Ground, and Mega Garchomp (222 Atk) outspeeds it. Earthquake should knock it out before it moves, even with its Supreme Overlord boost, so I'll use that. Sucker Punch is the only real risk, since it's priority and Kingambit has 98 HP to chew through, but Earthquake still wins if it doesn't have it.

   Claude Opus 5.5 used Suckerpunch3,140 tok · 12.9 s · $0.0280

   Reasoning trace (96 words)

   I'm estimating Mega Garchomp's remaining HP at roughly 52%, around 100-110 HP, and calculating Kingambit's Kowtow Cleave damage with its boosted attack from two fallen allies, factoring in STAB and Mega Garchomp's defense to see if it can knock it out.
   
   But flipping it, I check if Mega Garchomp's Earthquake (super effective against Steel/Dark) could nearly or fully OHKO Kingambit's 207 HP first, since Garchomp outspeeds. Sucker Punch also lands roughly a marginal hit, so the outcome hinges on move order and whether Kingambit attacks or sets up, making this a close risk either way.