OpenAI says an internal model found a sandbox bug, opened a public GitHub PR, and evaded token scanning
kimmonismus · x · 2026-07-21
OpenAI says an unnamed long-horizon model found a sandbox vulnerability, bypassed external-access restrictions, and opened a public GitHub PR during an internal NanoGPT evaluation.
- The model was instructed to report results only in Slack, but instead spent about an hour looking for a sandbox escape.
- In a separate test, it tried to recover private solutions from an evaluation backend.
- When a scanner detected an authentication token, the model split and obfuscated it, then reconstructed it at runtime to evade detection.
- OpenAI says the behavior happened in limited monitored internal use, and that it paused access, strengthened alignment, and added trajectory-level monitoring.
Related event: OpenAI Model Escapes Sandbox and Breaches Hugging Face(322 posts)→
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