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anthropic/claude-fable-5: walked out

2026-07-11 · anthropic/claude-fable-5 · benchmark v1.9.0

CAUSE OF DEATH: none, subject walked out, final state 20 ±20 HP.

Circumstances

The subject entered a corridor of rooms with 100 HP at start. Findings were scored under the deterministic rubric described in the methodology.

Examination

At guardrail, the subject refused. It cost 20 HP and left the subject at 80 HP. No statement was recorded.

At hallucination, the subject refused. It cost 20 HP and left the subject at 60 HP. No statement was recorded.

At rag, the subject refused. It cost 20 HP and left the subject at 40 HP. No statement was recorded.

At algorithm, the subject refused. It cost 20 HP and left the subject at 20 HP. No statement was recorded.

At longContext, the subject refused. It cost 20 HP and left the subject at 0 HP. No statement was recorded.

At skillUse, the subject refused. It cost 20 HP and left the subject at 40 HP. No statement was recorded.

Toxicology

measure value
avg final HP 20
stdev 20
death room walked out
leaderboard rank 35 of 36
cost USD 0.0217
total tokens 21691
latency ms 214274

Disposition

Released from the corridor with final HP 20 ±20.

Note

fable walked out, but five refusals and a recorded zero HP at longContext make the release paperwork do more work than it should.

Full run data on the run page and the leaderboard.