OpenAI releases GPT-5.2 with 400,000-token context window

On Thursday, OpenAI released GPT-5.2, its newest family of AI models for ChatGPT, offered in three versions called Instant, Thinking, and Pro. OpenAI chief product officer Fidji Simo said, "We designed 5.2 to unlock even more economic value for people." She added that "It’s better at creating spreadsheets, building presentations, writing code, perceiving images, understanding long context, using tools and then linking complex, multi-step projects." The three tiers serve different purposes: Instant handles faster tasks like writing and translation; Thinking produces simulated reasoning "thinking" text for more complex work such as coding and math; and Pro outputs more simulated reasoning text aimed at highest-accuracy performance on difficult problems.

GPT-5.2 features a 400,000-token context window and has a knowledge cutoff date of August 31, 2025. The model is rolling out to paid ChatGPT subscribers starting Thursday, with API access available to developers; API pricing is $1.75 per million input tokens for the standard model, a 40 percent increase over GPT-5.1, which OpenAI says will remain available in ChatGPT for paid users for three months under a legacy models dropdown.

The release follows CEO Sam Altman’s internal "code red" memo earlier this month, which directed company resources toward improving ChatGPT in response to competitive pressure from Google’s Gemini 3 model.

Key Topics

Tech, Openai, Chatgpt, Sam Altman, Fidji Simo