OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections
This story is from 2026-10-27. It is preserved in the archive; the latest stories are on the live feed.
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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- 2026-10-27 22:20 · r/deeplearning
OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections