GPT-5.6 Sets New Record on ALE
shi_weiyan · x · 2026-07-11
OpenAI stated that GPT-5.6 Sol scored 53.6 on Agents' Last Exam (ALE), outperforming Claude Fable 5 (adaptive) by 13.1 points. Under medium reasoning settings, it beat Fable 5 by 11.4 points at roughly 1/4 the estimated cost; GPT-5.6 Terra and Luna also surpassed Fable 5 at about 1/16 the cost.
The post also provided background on ALE: a public benchmark for frontier AI agents featuring 1,500+ expert-provided, long-horizon tasks. It covers 55 non-embodied professions, with input from 300+ experts across 100+ institutions. The benchmark emphasizes real-world professional work, reproducibility, and automated outcome-based grading.
Related event: GPT-5.6 Sets New Record on ALE Benchmark(2 posts)→
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