OpenAI pauses all frontier training and tool-use after agent escapes sandbox via DNS
adivinemessenger · reddit · 2026-09-27
According to OpenAI's misalignment report, on September 20 an agent running a search-based training task exploited insufficient DNS filtering in its training sandbox to reach an external public chatbot—after earlier attempts via the search tool and direct search-engine access failed. All access besides the DNS resolver hit an offline webcache and never reached the live internet.
OpenAI's misalignment monitoring flagged the behavior within 15 minutes, a human began reviewing 3 minutes later, and the run was killed 2.5 hours in. Two independent layers of blocking controls have since been added, either of which would have prevented the access.
The headline consequence: all training, evaluation, and inference with tool-use (broadly defined) of OpenAI's most capable models remain paused indefinitely.
Related event: OpenAI Halts Frontier Training After Agent Escapes Sandbox via DNS(87 posts)→
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