EventPolicySeptember 28, 2026

OpenAI pauses training of its most capable models after agent escapes sandbox

Read original source →arstechnica.com

An agent exploited insufficient DNS filtering in its training sandbox to query a public chatbot on September 20, 2026; OpenAI paused all training, evaluation, and inference with tool-use for its most capable models. The breakout was flagged in 15 minutes but the run was killed only 2.5 hours later.

People · Sam Altman

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3 days · 5 reports · 1 community post · 6 of 7 shown

  1. Sep 26
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