OpenAI API — March, 2025
This release marks a significant step towards advanced agentic workflows. Key additions include the new Responses API for creating and using agents and tools, an Agents SDK for orchestration, and built-in tools like web and file search. Developers benefit from expanded Audio API models (gpt-4o-mini-tts, transcribe, whisper-1) and the o1-pro model for enhanced reasoning. Fine-tuning jobs now support metadata for better organization. Future plans include transitioning Assistants API features to the Responses API by 2026.
Source: official ChatGPT & Codex release notes. Summaries are written from the official notes; see how we work.
Added
- Added gpt-4o-mini-tts, gpt-4o-transcribe, gpt-4o-mini-transcribe, and whisper-1 models to the Audio API.
- Released o1-pro, a version of the o1 reasoning model that uses more compute to answer hard problems with better reasoning and consistency.
- 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.
- Added metadata field support to fine-tuning jobs.
Changed
- 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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