OpenAI Retires GPT-5.2 From ChatGPT, Auto-Migrating Conversations to GPT-5.5

OpenAI·medium signal

As of June 12, OpenAI removed GPT-5.2 Instant, Thinking, and Pro from ChatGPT, with existing conversations automatically continuing on the corresponding GPT-5.5 variant. The quiet deprecation consolidates ChatGPT onto the newer GPT-5.5 line, now positioned as OpenAI's strongest dedicated coding model. Builders relying on GPT-5.2 behavior in chat workflows should expect routing changes and re-test prompts against 5.5.