AnalysisAI ModelsSeptember 11, 2026

GPT-6 Astra scores 2,340 Elo on ChessBench, ranked #11

ChessBench rates models on full games rather than puzzles; its Elo is field-relative, not a human chess rating. The leaderboard now spans 30 models across seven providers, with Claude Fable 5.1 (Max) at 2,370 Elo and $44.46 per task.

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GPT-6 Astra scores 2,340 Elo on ChessBench, ranked #11