GPT 5.1 and GPT 5 Pro: Enhanced AI Models Now Available in API Across US, AU, and EU

You can now access OpenAI's most powerful models directly through the API in multiple regions, with significant improvements in reasoning, speed, and customization!

GPT 5.1 and GPT 5 Pro bring advanced capabilities to developers with region-specific availability across the United States, Australia, and European Union. These models deliver improved reasoning, faster response times, and enhanced coding abilities to power your next-generation AI applications.

To access these models, simply pick GPT 5.1 or 5 Pro in the model picker.

Start building with these powerful new models today!