GPT-5.2
The December 2025 generation, shipped in three modes (instant, thinking (standard and extended), and Pro) with the latter two being reasoning models. A 400K-token context window and a coding-specialised sibling, GPT-5.2-Codex. Superseded by GPT-5.5 and then the GPT-5.6 tiers, so it is now mainly relevant to pipelines pinned to its behaviour.
GPT-5.2 is a frontier AI model from OpenAI. It costs $1.750 per million input tokens and $14.000 per million output tokens (blended $5.425/M), with a 400,000-token context window.
- Three modes including extended thinking
- 400K-token context
- Stable target for existing evals
- Pipelines pinned to GPT-5.2
- Knowledge work
- Migration baselines
Benchmarks
More from OpenAI
See all 28 →Frequently asked questions
How much does GPT-5.2 cost?
GPT-5.2 costs $1.750 per million input tokens and $14.000 per million output tokens, for a blended reference rate of $5.425 per million tokens.
What is GPT-5.2's context window?
GPT-5.2 supports up to 400,000 tokens of context in a single request.
What is GPT-5.2 best for?
GPT-5.2 is well suited to Three modes including extended thinking, 400K-token context and Stable target for existing evals.
Who makes GPT-5.2?
GPT-5.2 is developed and served by OpenAI. It was released in Dec 2025.