Artificial Analysis finds tool use lifts VIALS-AA scores for several models

1. 6:46 PM
   Artificial Analysis@ArtificialAnlysOfficial

   Tools lift VIALS-AA cell counting pass rates for Fable and Claude models

   AIArtificial Analysis reports that on 23 cell counting and quantification tasks in VIALS-AA, Fable's pass^3 rate falls from 65% with tools to 9% without, Claude Opus 5.5 (max) from 57% to 4%, and Claude Sonnet 5.5 (max) from 65% to 13%. GPT-6 Astra (max) falls from 61% to 35% and GPT-6.1 Sol (max) from 61% to 39%. On 23 phylogenetics tasks, Astra passes 78% with tools and 83% without.

   
2. 6:46 PM
   Artificial Analysis@ArtificialAnlysOfficial

   Artificial Analysis finds tools lift VIALS-AA scores, letting Claude Haiku 5.5 beat Fable 5.2

   AIArtificial Analysis reran its VIALS-AA visual reasoning benchmark without tools and found tool use nearly doubles average scores, from about 25% to 47%. Without tools, Claude Fable 5.2 (max) drops from 67% to 44%, falling below Claude Haiku 5.5 (max) at 49% with tools. Haiku costs $0.07 per task, about a tenth of Fable's $0.73 cost without tools.

   

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