OpenAI and Anthropic reportedly drafted binding deal to stress-test each other's models

beffjezos · x · 2026-09-22

Per The Information, OpenAI and Anthropic spent part of the year drafting a legally binding deal to stress-test each other's models.

Elon Musk pitched a similar idea last week: it was Amazon — not the government — that found the jailbreak in Fable and Mythos, after which Andy Jassy called the White House. He proposes informal weekly/biweekly calls between lab leaders and one to two weeks of competitor early access.

Legal framing: sharing safety research and standards is generally legal, but agreeing to cap compute, delay releases, or pause constitutes a horizontal output restriction, likely illegal. Beff Jezos endorses adversarial peer review as a good solution.

Related event: Report: OpenAI and Anthropic Nearly Struck Binding Deal to Stress-Test Each Other's Models(5 posts)→

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