GPT-6 Astra scores 62.7% on ARC-AGI-3 with the standard harness and 99.9% with a new provider adapter harness; Claude Opus 5 scored 30.2%, and GPT-5.6 Sol 7.8% (Greg Kamradt/ARC Prize)

Greg Kamradt / ARC Prize: GPT-6 Astra scores 62.7% on ARC-AGI-3 with the standard harness and 99.9% with a new provider adapter harness; Claude Opus 5 scored 30.2%, and GPT-5.6 Sol 7.8% — Summary — GPT-6 Astra scores 62.7% for 26K on ARC-AGI-3 Semi-Private with our Standard harness, and 99.9% for 19K with a Provider Adapter harness.

OpenAI prices GPT-6 Astra at 10/1M input tokens and 50/1M output tokens, matching Anthropic's pricing for Claude Fable 5.1 (The Deep View)
OpenAI launches GPT-6 Astra, initially for customers in its Daybreak program; Greg Brockman says it is a 'generational leap' and 'we are now in the AGI era' (Hayden Field/The Verge)
Anthropic launches Claude Opus 5, which it says comes close to Fable 5 performance at half the price; it is the new default model on Claude Max (Anthropic)

Source: Techmeme | 2026-09-03

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