Unverified claim: GPT-6 is just GPT-5.6 Sol rebranded, cutoff still June 2024
martin_rj · reddit · 2026-09-13
A Reddit user claims OpenAI's GPT-6 is a rebrand: allegedly GPT-6 is just GPT-5.6 Sol with different reasoning levels (GPT-6 "Low" equals GPT-5.6 "High"), still built on the GPT-4 pretrained base, and the Playground model reports a June 2024 knowledge cutoff. The post also notes ARC-AGI-3 now allows a Provider Adapter Harness that works with GPT-5 too, calling cross-benchmark incomparability intentional. Unverified personal claim.
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