Unreleased OpenAI internal model tops BenchCAD leaderboard at 87.5%, edging Claude Fable 5.2's 83.5%
ChrisGPT · x · 2026-11-11
An unreleased OpenAI internal model sits atop BenchCAD's custom-harness leaderboard at 87.5%, above Claude Fable 5.2 at 83.5% ($51/case vs $38). Caveat: the OpenAI result used the older 2.0 scorer, and BenchCAD notes scores across harnesses aren't directly comparable despite listing it under BenchCAD 2.1. Further back: Claude Opus 5.5 (65.3%), Sonnet 5.5 (60.9%), Fable 5.1 (44.4%), Haiku 5.5 (22.9%).
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