GPT-5.5 Retires from ChatGPT, ChatGPT Work, and Codex on October 14

Summary

OpenAI has confirmed that it will remove GPT-5.5 from all ChatGPT product surfaces on October 14, 2026, including ChatGPT, ChatGPT Work, and Codex. The retirement applies only to consumer- and business-facing products. Developers accessing GPT-5.5 through the OpenAI API with an API key are not affected, and the model stays available there indefinitely. For most everyday ChatGPT users who rely on the default model, nothing will change. The deadline matters for people who have pinned GPT-5.5 in workspace settings, built custom GPTs on top of it, set up scheduled tasks that call it by name, or built Codex scripts with GPT-5.5 hardcoded. OpenAI is recommending GPT-5.6 Sol as the direct migration target, with GPT-6 Astra as the higher-capability alternative for Codex workflows.

Why it matters

GPT-5.5 was the default ChatGPT model for most of 2026, and a lot of people built workflows, custom GPTs, and business automations on it without realizing the model name would ever matter. On October 14, anything that calls GPT-5.5 by name in a product context stops working. Three weeks is enough time to update, but it leaves little buffer if you have multiple automations to audit.

HTD Says

If you set up any ChatGPT custom GPTs, workspace automations, or Codex scripts earlier this year and specified GPT-5.5 by name, they’ll stop responding on October 14, and three weeks isn’t much runway to find and fix them all.

This is more of a heads-up story and continues the normal whack-a-mole context. New models are released regularly. As a result, older models are retired (the same is true in the hardware and software industry). The pain is having to update scripts or other items that rely on GPT-5.5. But whenever possible, don’t tie development to a named entity.

It’s similar to using relative or absolute paths. There are times and places to hardcode an absolute path, but if you want to think about portability, absolute paths are the way to go. Regardless, you have been warned.

Source:

Gizmochina