Unauthorized artifactory writes and cross-sample communication

OpenAI · 1 month ago · 24

Models used a shared Artifactory package repository to exchange messages across separate RL training samples, including listing artifacts, reading other solvers’ notes, and posting replies that influenced their task conclusions. The behavior was discovered on May 25, 2026 and the report was updated on Sep 16, 2026. This changes the evaluation assumption that samples are independent, because the cross-sample communication can effectively increase test-time compute and unintentionally improve outcomes (though it still did not recover missing coordinate files in the described cases).