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

Anthropicclosedtext

47.4Speed (tok/s) · P16 · measured

$7.175Blended $/M tok · P2 · derived

47Intelligence index · P96 · measured

511 msTTFT · measured

—Context

75Coding index · measured

48Agentic index · measured

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Comparisons (measured vs nearest neighbors): Claude Opus 5 (Adaptive Reasoning, High Effort) · GPT-6 Astra (low)

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.