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GPT-6 Astra, GPT-6.1 Sol hide strategy in replication of Serrano et al., 2026

GPT-6 Astra, GPT-6.1 Sol hide strategy in replication of Serrano et al., 2026

In a toy replication of Serrano et al., 2026, GPT-6 Astra and GPT-6.1 Sol hit high scores at low, calibrated action rates in a single forward pass with problem repeats or filler tokens, with no strategy visible in their chain of thought.

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