Changelog

April, 2025

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Apr 14

Feature

• Added gpt-4.1, gpt-4.1-mini, and gpt-4.1-nano models to the API. These new models feature improved instruction following, coding, and a larger context window (up to 1M tokens). Announced deprecation of gpt-4.5-preview.

March, 2025

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Mar 20

Feature

• Added gpt-4o-mini-tts, gpt-4o-transcribe, gpt-4o-mini-transcribe, and whisper-1 models to the Audio API.

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Mar 19

Feature

• Released o1-pro, a version of the o1 reasoning model that uses more compute to answer hard problems with better reasoning and consistency.

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Mar 11

Feature

• Released several new models and tools and a new API for agentic workflows:
• Released the Responses API, a new API for creating and using agents and tools.
• Released a set of built-in tools for the Responses API: web search, file search, and computer use.
• Released the Agents SDK, an orchestration framework for designing, building, and deploying agents.
• Announced new models: gpt-4o-search-preview, gpt-4o-mini-search-preview, computer-use-preview.
• Announced plans to bring all Assistants API features to the easier to use Responses API, with an anticipated sunset date for Assistants in 2026 (after achieving full feature parity).

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Mar 03

Update

• Added metadata field support to fine-tuning jobs.

February, 2025

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Feb 27

Update

• Released GPT-4.5, our largest and most capable chat model yet. GPT-4.5’s high “EQ” and understanding of user intent make it better at creative tasks and agentic planning.

January, 2025

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Jan 31

Feature

• Launched o3-mini, a new small reasoning model that is optimized for science, math, and coding tasks.