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OpenAI GPT-6 Sol and Luna Bring Lower-Cost Models to ChatGPT, Codex and APIs

This story is from 2026-09-28. It is preserved in the archive; the latest stories are on the live feed.

OpenAI has introduced GPT-6 Sol and GPT-6 Luna , two new models positioned as more cost-efficient successors to prior GPT-5.6 variants and Astra. The releases turn an earlier teaser into a concrete product development: Sol and Luna are rolling out through ChatGPT Work, Codex and OpenAI’s API, with…

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  1. 2026-09-28 21:30 · DEV Community — AI
    OpenAI GPT-6 Sol and Luna Bring Lower-Cost Models to ChatGPT, Codex and APIs

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