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OpenAI API — August, 2025

This release marks a significant expansion of platform capabilities with the introduction of the GPT-5 family of models, including gpt-5, gpt-5-mini, and gpt-5-nano. Enhancements include the general availability of the Realtime API for immediate responses, plus new APIs for managing long-running conversations and connecting models to external services like Google apps and Dropbox. Developers also benefit from a new custom tool call type for flexible interactions and a minimal reasoning effort value for optimizing GPT-5 model responses.

Added

  • Added support for connectors to the Responses API. Connectors are OpenAI-maintained MCP wrappers for popular services like Google apps, Dropbox, and more that can be used to give model read access to data stored in those services.
  • Released the Conversations API, which allows you to create and manage long-running conversations with the Responses API. See the migration guide to see a side-by-side comparison and learn how to migrate from an Assistants API integration to Responses and Conversations.
  • Released GPT-5 family of models in the API, including gpt-5, gpt-5-mini, and gpt-5-nano.
  • Introduced the minimal reasoning effort value to optimize for fast responses in GPT-5 models (which support reasoning).
  • Introduced custom tool call type, which allows for freeform inputs to and outputs from the model when tool calling.

Changed

  • The OpenAI Realtime API is now generally available. Learn more in our Realtime API guide.