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Data retention practices for Mythos-class models

To ensure we’re responsibly deploying Mythos-class models, we are requiring limited data retention and review as part of our safety work. Prompts submitted to, and outputs generated by, Mythos-class models are retained for 30 days for trust and safety purposes, on every platform where these models are offered.

This applies to Mythos-class models and future models with similar capabilities that we designate as covered models . For all other models, everything you use is unaffected and stays under the current terms.

This policy, described below, goes into effect on June 9, 2026.…