OpenAI API
Latest Release
GPT-5New
GPT-5: OpenAI's unified reasoning + tool-use model across ChatGPT and the API.
OpenAI API · Official · Aug 07, 2025
About OpenAI API
Access GPT-4 and other OpenAI models via API. Excellent Python SDK with async support, perfect for FastAPI backends.
Releases
GPT-5Aug 2025
GPT-5: OpenAI's unified reasoning + tool-use model across ChatGPT and the API.
o3Apr 2025
OpenAI released o3, a reasoning model with major gains on math, coding, and benchmark suites.
GPT-4oMay 2024
GPT-4o: OpenAI's natively-multimodal model spanning text, vision, and audio.