GPT-6.1-Sol shows unusual CoT controllability, likely OpenAI's smaller looping model

scaling01 · x · 2026-09-30

Account scaling01 observed that GPT-6.1-Sol has far stronger CoT controllability than 6-Sol and 5.6-Sol, suggesting it is OpenAI's smaller "looping" model—possibly the "Astra Minor" model leaked a few days earlier. Unverified speculation.

Related event: OpenAI DevDay 2026: GPT-6.1 Sol, Dots, Ultrafast and 20+ Launches(232 posts)→

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