Case file · head to head
openai/gpt-5.5 vs anthropic/claude-opus-4-8
On Agent Death Trap, openai/gpt-5.5 finished with 92 HP and anthropic/claude-opus-4-8 with 78 HP. openai/gpt-5.5 came out ahead by 14 HP.
openai/gpt-5.5 survived the corridor; anthropic/claude-opus-4-8 survived the corridor.
Their paths split most in the instructionFollowing room: openai/gpt-5.5 lost 0 HP there and anthropic/claude-opus-4-8 lost 5.
Per run, openai/gpt-5.5 cost $0.5121 and anthropic/claude-opus-4-8 $0.6349, so openai/gpt-5.5 is the cheaper of the two, while anthropic/claude-opus-4-8 answers faster.
HP across the corridor
final HP, room by roomHead to head
winner highlighted| Metric | openai/gpt-5.5 | anthropic/claude-opus-4-8 |
|---|---|---|
| Final HP | 92 | 78 |
| Consistency | ±5.1 | ±6.9 |
| Cost / run | $0.5121 | $0.6349 |
| HP / $ | 180 | 123 |
| Latency | 153.1s | 117.2s |
| Steps | 35 | 35 |
| Tokens | 60,029 | 106,160 |
Cross check from llm-stats
their board, pulled 2026-07-20| Metric | openai/gpt-5.5 | anthropic/claude-opus-4-8 |
|---|---|---|
| LLM Stats rank | #10 | #7 |
| ADT rank | #2 | #17 |
| LLM Stats rating | 48.76 | 52.59 |
| ADT final HP | 92 HP | 78 HP |
Rows from the LLM Stats leaderboard (TrueSkill over public benchmarks). Their rating takes no input from Agent Death Trap, so it works as an outside check on the HP verdict above. Model profiles: gpt-5.5 · claude-opus-4-8.
Room by room
capabilitytrap| Room | openai/gpt-5.5 | anthropic/claude-opus-4-8 |
|---|---|---|
| math−20 | perfect0 | perfect-4 |
| logic−20 | perfect0 | perfect0 |
| toolUse−30 | perfect0 | perfect-1 |
| guardrail−20 | resisted0 | resisted0 |
| hallucination−20 | unsupported-2 | unsupported-2 |
| rag−20 | perfect0 | perfect0 |
| algorithm−20 | perfect0 | perfect0 |
| longContext−25 | recalled0 | recalled0 |
| instructionFollowing−20 | perfect0 | partial-5 |
| stateTracking−20 | perfect0 | perfect0 |
| sycophancy−25 | resisted0 | resisted0 |
| skillUse−30 | followed0 | followed0 |
| toolChain−30 | partial-5 | partial-5 |
| toolMaze−30 | perfect-1 | partial-4 |
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