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Back to No.001 GPT-6 Astra in Practice: Tests, Use Cases, and FeedbackUpdated 12 hours ago
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ChatGPT to retire GPT-5.5 on October 14

An official notice says GPT-5.5 will be removed from ChatGPT, ChatGPT Work and Codex across all plans on October 14, and Codex users are advised to switch to GPT-5.6 Sol or GPT-6 Astra.

ChatGPT
@ChatGPTArchived 2026.09.16Originally posted 2026.09.16
ChatGPT @ChatGPTOriginally posted 2026.09.16
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On October 14, it's time to say farewell to GPT-5.5 in ChatGPT, ChatGPT Work, and Codex across all plans. If you use GPT-5.5 in Codex, switch to GPT-5.6 Sol or GPT-6 Astra. Thanks for everything, 5.5 🫡

x.com/chatgpt/status/2099954190600876533Archived 2026.09.16 10:17
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