Code Arena: GPT-6 Astra ranks #1, but Claude Fable 5.1 wins more head-to-head battles
arena · x · 2026-09-17
LMArena's Code Arena: WebDev leaderboard now ranks OpenAI's GPT-6 Astra (Max) #1 at 1800 points, with Anthropic's Claude Fable 5.1 (Max) second at 1758.
- Win rate measures user preference in anonymous head-to-head battles. Astra clearly wins most matchups, including 72.5% against GPT-5.6 Sol (xHigh).
- The exception is Claude Fable 5.1: in direct battles, Fable 5.1 wins 43.5%, Astra wins 29.0%, and 27.4% end in ties.
- Despite Astra's top ranking, Arena users actually prefer Fable 5.1 when comparing the two models' outputs side by side.
Related event: GPT-6 Astra Tops Code Arena as Claude Fable Holds Higher Win Rate(3 posts)→
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