This is with the caveat that OpenAI uses their own harness for this:

> On ARC-AGI-3, GPT-6 Astra was run with our responses API harness , which changes two settings to better match real-world performance. The changes do not specifically target ARC-AGI-3.

"On the current ARC-AGI-3 leaderboard, conventional frontier-model runs sit dramatically below Astra's reported 98.6% result.

But the comparison isn't straightforward.

OpenAI's own evaluation notes say Astra uses the company's Responses API harness, while comparison models can operate under different configurations."

The blog post says 99.9%. Oddly, it does better on ARC-AGI-3 than it does on version 1 or 2 of the same benchmark (though gets 95+ on all three)

100%, some say.-