OpenAI: GPT-5.2 API
OpenAI's professional-grade flagship model released in December 2025. It is the first model to match or exceed human expert levels (70.9% win rate) on GDPval, an evaluation covering 44 occupations. Compared to GPT-5.1, it features significant enhancements in multi-step agentic workflows, complex spreadsheet modeling, and 3D front-end development.
- Context window: 400,000 tokens
- Max output: 128,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2025-12-11
- Knowledge cutoff: 2025-08-31
Frequently Asked Questions
What is the context window of GPT-5.2?
GPT-5.2 supports a context window of up to 400,000 tokens.
Does GPT-5.2 support function calling?
Yes. GPT-5.2 supports tool / function calling.
Does GPT-5.2 support reasoning?
Yes. GPT-5.2 is a reasoning-capable model.
What is the knowledge cutoff of GPT-5.2?
The knowledge cutoff of GPT-5.2 is 2025-08-31.