# ARC Prize reports wide GPT-6 Astra score gap across test harnesses

_Sunday, September 6, 2026 at 8:23 AM EDT · AI · Latest · Tier 1 — Major_

![ARC Prize reports wide GPT-6 Astra score gap across test harnesses — Primary](https://media.thenextweb.com/2026/09/OpenAI-Astra.jpg)

ARC Prize published results showing GPT-6 Astra scored 62.7% on ARC-AGI-3 under its standard harness and 99.9% using OpenAI's Provider Adapter. The benchmark organization said the adapter preserves opaque reasoning state between requests and compacts longer conversations, unlike its minimal standard interface. ARC Prize said it is not claiming the result establishes AGI and will publish both harness results side by side. The source also reports that the compared 99.9% Astra and 7.8% Sol figures came from different harnesses.

## Sources

- [The Next Web](https://thenextweb.com/news/openai-astra-arc-agi-3-harness-62-7-vs-99-9-benchmark-revisions)

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Canonical: https://techandbusiness.org/newswire/JSplD_01p9sRcCEtAjBoea
Retrieved: 2026-09-06T16:33:53.092Z
Publisher: Tech & Business (techandbusiness.org)