← Back to timelineModel release
OpenAI launches GPT-5
A unified flagship system routes between faster answers and deeper reasoning.
Model labOpenAI
OpenAIRelease date7 Aug 2025
OpenAI began rolling out GPT-5 in ChatGPT as a system combining faster responses, a deeper reasoning model and a router. Developers also received GPT-5 models through the API; the API offering was not identical to ChatGPT’s routed system. OpenAI OpenAI
Sources & attribution
- Organizational disclosure 7 Aug 2025gpt 5 release announcement
OpenAI. Original developer announcement.
- Organizational disclosure 7 Aug 2025Introducing GPT-5 for developers
OpenAI. Original developer announcement.