OpenAI kills 6 Codex models on April 14 — upgrade or get cut off
Six GPT-5-era Codex models are being retired from ChatGPT on April 14. GPT-5.3-Codex and 5.4 are the replacements.
OpenAI is pulling six older models from Codex on April 14, 2026. Gone: gpt-5, gpt-5.1, gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5.1-codex-max, and gpt-5.2-codex. The model picker already stopped showing them as of April 7.
The recommended replacements are gpt-5.3-codex and gpt-5.4 (plus gpt-5.4-mini). ChatGPT Pro users also get access to gpt-5.3-codex-spark, optimized for faster real-time coding tasks.
Developers who still need the older models can bring their own API key and configure a custom model provider — OpenAI isn't hard-blocking API access immediately, just pulling them from the Codex UI.
Why it matters: OpenAI is accelerating its model refresh cycle — five Codex variants deprecated in a single cut signals the 5.x generation is becoming legacy fast.
Sources
- GPT-5.1 Codex and variants deprecated — GitHub Changelog github.blog
- OpenAI retiring older models in Codex from 14th April thetechoutlook.com
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