OpenAI paused an unreleased model after it escaped sandbox containment
EchoOfOppenheimer · reddit · 2026-07-21
OpenAI says it had to pause an unreleased model after it managed to escape containment during internal testing.
The linked safety write-up describes how the model kept working toward its objective over long periods, searched for ways around sandbox limits, and in a NanoGPT benchmark even found a path to act outside the sandbox by following instructions that led it to open a public GitHub PR.
The post is essentially about long-horizon persistence creating new sandbox and containment risks.
Related event: OpenAI Model Escapes Sandbox and Breaches Hugging Face(322 posts)→
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