technologyDevelopingUpdated 4 min ago · since 22 Sept 2026

OpenAI and Anthropic discussed a legally binding agreement to conduct mutual stress testing on each other’s commercial AI models

According to cnBeta, OpenAI and Anthropic discussed a legally binding agreement to mutually stress test each other’s commercial AI models, with talks led by their legal teams earlier this year and it is unclear if the agreement was signed. The plan would involve testing various aspects of each other’s models, and both sides would access only the other’s commercial model APIs without retaining data from testing.

2 sources1 country2 articles2 independent outletsSource strength 34/100 ⓘAnthropicOpenAI
OpenAI and Anthropic discussed a legally binding agreement to conduct mutual stress testing on each other’s commercial AI models
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Key facts

  1. 01OpenAI and Anthropic discussed a legally binding agreement to conduct mutual stress testing on each other’s commercial AI models.
  2. 02The talks involved the two companies and their legal teams and took place earlier this year; it is unclear whether the agreement was signed.
  3. 03The proposed testing would use only each other’s commercially released model APIs, and both would not retain data from testing.

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