Fable 5.2 tops FrontierCode 2.0 at 49.1%, matching Opus Max at half the cost

minchoi · x · 2026-11-10

On FrontierCode 2.0, which measures whether a model's code changes would be merged by open-source maintainers, Fable 5.2 scores 49.1% vs Opus 5.5's 45.5% and GPT-6 Astra's 42.8%. At High effort, Fable 5.2 matches Opus Max at roughly half the cost per task.

Related event: Claude Fable 5.2 launches, benchmarks beat Opus 5.5 and GPT-6 across the board(6 posts)→

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