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OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections

Researchers at Xint found that OpenAI's compaction feature can be used to copy private model reasoning into ordinary plain text output. Compaction shortens long conversations to manage context limits. The model's internal chain-of-thought, which the service is designed to keep hidden from callers,…

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Timeline · 2 reports

  1. 2026-10-27 22:20 · r/deeplearning
    OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections
  2. 2026-10-27 22:18 · r/learnmachinelearning
    OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections

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