Developer Tools & APIs
GPT-5.4 and GPT-5.4 mini are now retired from Codex for ChatGPT-authenticated users
From 31 August 2026, GPT-5.4 and GPT-5.4 mini no longer work in Codex under ChatGPT sign-in. Here is what to do.
Topic
GPT 5 4
3 posts about GPT 5 4 from Simon Carter.
Developer Tools & APIs
GPT-5.4 and GPT-5.4 mini retire from Codex on 31 August 2026 for ChatGPT users
OpenAI is retiring GPT-5.4 and GPT-5.4 mini from Codex for ChatGPT-authenticated users on 31 August 2026. Here's what to do before the deadline.
Models & Assistants
GPT-5.4 Mini and Nano: OpenAI's Fastest Small Models Are Built for the Age of AI Agents
OpenAI releases GPT-5.4 mini and nano — faster, cheaper models designed for agentic workflows, with near-flagship performance at a fraction of the cost.