Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)

Anthropicclosedtextvision

65.8Speed (tok/s) · P36 · measured

$7.175Blended $/M tok · P2 · derived

53.4Intelligence index · P100 · measured

26814 msTTFT · measured

1000kContext · list

82Coding index · measured

58Agentic index · measured

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Comparisons (measured vs nearest neighbors): Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) · Claude Opus 5 (Adaptive Reasoning, Max Effort)

Released 2026-09-01 · catalog data 2026-09-14 · field-level provenance shown per metric above (measured / derived / list, from the catalog sources map); percentiles computed across the 329-model catalog at generation time. Numbers are catalog-sourced and labeled as such — lab-measured lanes stay separate by design. Generated page — do not hand-edit.

Model names are trademarks of their respective owners. Not affiliated with, endorsed by, or sponsored by any provider or measurement service. Sources, attribution & corrections.