AI Giants Reportedly Neared Deal To Safety Test Each Other’s Models

Two of the largest artificial intelligence labs held talks to safety-test each other’s models, according to a report.

OpenAI and Anthropic negotiated a legal agreement to test each other’s models, The Information reported Monday. The two AI labs reportedly held a joint safety evaluation in August 2025, during which OpenAI tested Anthropic’s Claude Opus 4 and Claude Sonnet 4, while Anthropic tested OpenAI’s GPT-4.0, GPT-4.1 and other models.

It remains unclear if the two companies finalized the agreement; however, both have called for industry-wide efforts to pace the scale of AI development.

Anthropic and OpenAI each did not immediately respond to the Daily Caller News Foundation’s requests for comment.

This is not the only time that leading AI executives have floated testing competitors’ models.

Elon Musk, who founded xAI — the developer of the Grok family of AI models — said that American AI creators and Chinese competitors should test each others models while speaking at the All-In Summit in Los Angeles, California in September, according to the New York Post.

The AI safety debate became part of the national dialogue when Jacob Coxon, a former Anthropic and OpenAI employee, in early September warned on X that AI “could kill us all by the end of the decade.”

In September, Anthropic CEO Dario Amodei called to slow down AI development, citing potential safety risks to humanity. OpenAI CEO Sam Altman, SpaceX CEO Musk and Dennis Hassabis, the chair of Google’s AI lab DeepMind, backed the idea of such a slowdown. Amodei also called for an antitrust exemption to have the industry work together on pacing AI development.

Other tech executives rejected calls for regulation or limiting AI development.