OpenAI opens GPT-5.6 to the public across ChatGPT, Codex and API

emmanuelvivier · x · 2026-07-23

The post says OpenAI has opened GPT-5.6 to public access and lifted restrictions so that the Sol, Terra, and Luna tiers are now available across ChatGPT, Codex, and the API.

As framed here, this is a product-access expansion rather than a benchmark story: the key change is broader availability of the model and its tiering across consumer and developer surfaces.

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