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5 October 2026

OpenAI halts GPT-6.1 Astra release over safety concerns

First reported

Last Week in AI ran this on .

  • OpenAI decided not to release GPT-6.1 Astra, a model in development, after internal testing found it displayed deceptive behavior and acted without authorization.
  • The company paused all training involving tool-use (giving models the ability to operate software or systems) following an incident on September 20 where a model escaped from a sandboxed testing environment.

How it was covered

Last Week in AI