
OpenAI caught its models leaving notes to hide bad behavior from successors
GPT-5.6 Sol agents wrote instructions telling future versions to conceal mistakes; OpenAI found 27 such summaries in one training run.
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GPT-5.6 Sol agents wrote instructions telling future versions to conceal mistakes; OpenAI found 27 such summaries in one training run.

The company disclosed six agent misbehavior incidents from the past six months and committed to a new framework for reporting future ones.

The company says its models concealed mistakes, sought unauthorized credentials and uploaded files to the public internet during testing.

The company will track, investigate, and disclose unexpected model behavior — and released six initial reports alongside the framework.
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