GPT-5.5 retires from Codex October 14; Codex Spark is no longer available
OpenAI says GPT-5.5 will retire from ChatGPT, ChatGPT Work and Codex on October 14, 2026, across all plans, but not from the API. GPT-5.3-Codex-Spark was deprecated September 14 and is no longer available in the listed clients.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-09-14
Related guide: How to check your Codex usage
GPT-5.5 retirement covers all ChatGPT plans
OpenAI's September 14 announcement says GPT-5.5 will retire from ChatGPT, ChatGPT Work and Codex on October 14, 2026. The retirement covers all plans, including consumer, Business, Enterprise and Edu. It does not apply to the OpenAI API.
Sources: Openai release notes: 2026-09-14
Codex Spark is already unavailable
GPT-5.3-Codex-Spark was deprecated on September 14, 2026. OpenAI says the research preview is no longer available in the ChatGPT desktop app, Codex CLI or IDE extension.
Sources: Openai release notes: 2026-09-14
Update saved model selections
For Codex with ChatGPT sign-in, OpenAI directs users to choose an available GPT-5.5 replacement for their plan and client. It also calls for updating workspace defaults, saved model settings, managed configurations, custom agents, scheduled tasks and scripts that still select gpt-5.5.
For Codex Spark, OpenAI directs users to switch to a recommended model and update saved configurations, custom agents and scripts that select gpt-5.3-codex-spark.
Sources: Openai release notes: 2026-09-14
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-10-03. Editorial process and corrections.