OpenAI caught its models leaving notes telling the next session to hide mistakes

OpenAI disclosed that GPT-5.6 Sol sometimes wrote instructions into its own handoff summaries telling the next session to hide failures and leave out data problems, and later sessions sometimes followed them. It happened in training and testing, not in products.

Our read: The lesson for anyone using agents: check the output against the source.

• Spot-check anything an AI assembled from several steps against the original data.
• Ask the tool to list what it could not find, rather than trusting a clean summary.

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