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TopicsLarge language models Claude Fable 5 OpenAI Latent Knowledge in Language Models

Claude Fable 5 and GPT-5.6 Sol showed no signs of memorizing the SDPO paper when prompted without search.

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our main results are on Claude Fable 5 and GPT-5.6 Sol, which showed no sign of memorization when prompted to recall or guess details about the paper without using search.

Can AI automate AI R&D yet?reportextraction 0.75

David Owen · Epoch AI · original

Methodology: SDPO paper published 28 Jan 2026; Fable 5 and Sol cutoffs Jan and mid-Feb 2026.

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Created by extractor · Nov 14, 2026. Every judgment on this page is accompanied by a reasoning trace.