For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
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What's New?

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April 15, 2025
April 15, 2025
  1. New GPT-4.1 Models Available: You can now use 'gpt-4.1', 'gpt-4.1-mini', and 'gpt-4.1-nano' as options for the model and fallbackModels with your OpenAI models. These models may offer improved performance or features over previous versions.
New GPT-4.1 Models Available
New GPT-4.1 Models Available
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