GPT-6 Astra: 62.7% verified, 99.9% advertised, $10 per million tokens
OpenAI reported 99.9% for GPT-6 Astra on ARC-AGI-3; ARC Prize's own runs of the same model scored 62.7% under its provider-neutral harness and 99.9% under OpenAI's context-management adapter, for $26,098 and $18,817 per run. Artificial Analysis measures the model level with Claude Fable 5.1 on its Intelligence Index at about 40% of the cost, and two code-review benchmarks disagree about whether it catches more bugs than the cheaper GPT-5.6 Sol.