Only relevant to developers with existing GPT-5.2 apps; it's no longer in ChatGPT and OpenAI points to GPT-6 Astra.
Kenning's take
What it does
GPT-5.2 was OpenAI's flagship model when it launched in December 2025, offered in ChatGPT as Instant, Thinking and Pro versions on paid plans. GPT-5.4 Thinking replaced it in ChatGPT in March 2026 and it was removed from Codex model pickers in May 2026. It remains available in the API, where OpenAI now points users to GPT-6 Astra.
- 400K-token context window
- 128K maximum output
- Text and image input
- Reasoning effort from none to xhigh
Who it suits. Developers with existing apps built on GPT-5.2 in the OpenAI API.
Key facts
- Category
- AI models
- Part of
- ChatGPT
- Made by
- OpenAI
- Based in
- United States
- Released
- 11 December 2025
- How to get it
- OpenAI API (model gpt-5.2); no longer the ChatGPT default
- Works on
- API
- In the UK
- Yes
- API price
- $1.75 per million input tokens, $14 per million output
Reviews and write-ups
- GIGAZINE 2025-12-12
FAQ
When was GPT-5.2 released?
OpenAI released GPT-5.2 on 11 December 2025.
Is GPT-5.2 still in ChatGPT?
GPT-5.4 Thinking replaced it for Plus, Team and Pro users in March 2026; it remains in the API.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
Similar tools
Astra for Law
OpenAI's GPT-6 Astra set up with a US legal search index for legal research and drafting
ChatGPT Images 2.0
OpenAI's April 2026 image model, better at dense text and world knowledge, with a new thinking mode
ChatGPT Images 2.5
OpenAI's September 2026 image model with sharper detail, steadier edits and up to 50% faster generation
GPT-5.1-Codex-Max
OpenAI coding model built for long agent sessions, now marked deprecated in the API