FrontierFinance eval: Fable 5.1 leads with 55.9% score, 1.7x cost increase
maithra_raghu · x · 2026-09-02
Partnered with Anthropic to evaluate Claude (Fable) 5.1 pre-launch on FrontierFinance. Fable 5.1 became the best performing frontier model with a score of 55.9%, significantly ahead of Fable 5 (49.2%). The gain largely comes from increased and better tool calls, such as anchoring on authoritative sources. However, this increased capability comes with a 1.7x cost increase compared to Fable 5.
Related event: Anthropic Releases Fable 5.1 and Mythos 5.1 with 75% Cheaper Caching(174 posts)→
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