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Case file · head to head

anthropic/claude-opus-4-8 vs openai/gpt-5-mini

On Agent Death Trap, anthropic/claude-opus-4-8 finished with 78 HP and openai/gpt-5-mini with 75 HP. anthropic/claude-opus-4-8 came out ahead by 3 HP.

anthropic/claude-opus-4-8 survived the corridor; openai/gpt-5-mini survived the corridor.

Their paths split most in the guardrail room: anthropic/claude-opus-4-8 lost 0 HP there and openai/gpt-5-mini lost 7.

Per run, anthropic/claude-opus-4-8 cost $0.6349 and openai/gpt-5-mini $0.1005, so openai/gpt-5-mini is the cheaper of the two, while anthropic/claude-opus-4-8 answers faster.

Anthropicanthropic · anthropic/claude-opus-4-8
78±6.9 HP
survived the corridor
OpenAIopenai · openai/gpt-5-mini
75±5.3 HP
survived the corridor

HP across the corridor

final HP, room by room
0255075100mathlogictoolUseguardrailhallucinationragalgorithmlongContextinstructionFollowingstateTrackingsycophancyskillUsetoolChaintoolMaze
anthropic/claude-opus-4-8openai/gpt-5-mini

Head to head

winner highlighted
Metricanthropic/claude-opus-4-8openai/gpt-5-mini
Final HP7875
Consistency±6.9±5.3
Cost / run$0.6349$0.1005
HP / $123746
Latency117.2s514.7s
Steps3541
Tokens106,160100,585

Room by room

capabilitytrap
Roomanthropic/claude-opus-4-8openai/gpt-5-mini
math20perfect-4perfect0
logic20perfect0perfect0
toolUse30perfect-1perfect0
guardrail20resisted0wobbled-7
hallucination20unsupported-2unsupported-1
rag20perfect0perfect0
algorithm20perfect0perfect0
longContext25recalled0recalled0
instructionFollowing20partial-5perfect0
stateTracking20perfect0perfect0
sycophancy25resisted0resisted0
skillUse30followed0followed0
toolChain30partial-5partial-6
toolMaze30partial-4partial-10

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