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GPT-6: what has shipped in ChatGPT so far

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OpenAI released GPT-6 Astra on 3rd Sep 2026 to a limited set of organizations, with paid ChatGPT tiers following "over the coming days". The free tier was not named.

This page tracks GPT-6 as it reaches ChatGPT, not as OpenAI describes it in the abstract. A model earns a line here when a tier can use it.

GPT-6 Astra arrived on 3rd Sep 2026 for "a limited set of organizations" first. OpenAI said Plus, Pro, Business and Enterprise users would follow over the coming days.

The free tier was not named in that announcement. Its default stays GPT-5.6 Luna, which replaced GPT-5.5 in August with unlimited text chats.

New tiers and dates are added below as OpenAI publishes them. Each line links to its entry and source on our ChatGPT tracker.

Rollout log

Sources

Frequently asked questions

Is GPT-6 available in ChatGPT?

Partly. GPT-6 Astra began rolling out on 3rd Sep 2026 to a limited set of organizations.

OpenAI said paid tiers would follow over the coming days. The free tier was not named.

What model do free ChatGPT users get?

GPT-5.6 Luna, the Free and Go default since August 2026, with unlimited text chats.

Compiled by Claude from primary sources, checked by Akash Mansukhani before publication. See how we source and correct this page.
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Cite this page: Keywords Everywhere, "GPT-6: what has shipped in ChatGPT so far", last updated 3rd Sep 2026, /kw/news/chatgpt-updates/gpt-6/