GPT-5.6 Sol Reasoning Details: Lack of Memory Forces Re-learning Every Step

charliermarsh · x · 2026-07-30

Developer charliermarsh provided further context on the reasoning mechanism of GPT-5.6 Sol during the ARC-AGI-3 test. He pointed out that without the ability to retain reasoning across turns, the model is asked to figure out the game anew with each action.

In this scenario, the model can still see a record of past moves and brief accompanying notes, but it cannot access the underlying plans, insights, or thoughts that led to those actions, significantly hindering its multi-step reasoning performance.

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