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OpenAI Responses API
The Responses API is OpenAI's unified interface for agent-like applications with built-in tools, multimodal inputs, stateful context, function calling, and streaming.
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OpenAI Responses APILive preview unavailable
What to know
Key features
- Agentic API
- Built-in tools
- Stateful context
- Multimodal input
- Streaming
Best for
- AI agents
- Search assistants
- Document workflows
- Automation
Pros
- Unified interface for multimodal reasoning and agentic workflows
- Built-in support for tools like web search and code interpreter
- Simplified state management via server-side context storage
Cons
- Reduced determinism and predictability compared to Chat Completions
- Less control over orchestration and custom caching layers
- Operates as a 'black box' runtime, limiting precision for mission-critical pipelines
OpenAI Responses API FAQ
What is OpenAI Responses API used for?
OpenAI Responses API is commonly used for AI agents, Search assistants, Document workflows.
Is OpenAI Responses API free?
OpenAI Responses API uses paid pricing.
How do I compare OpenAI Responses API with alternatives?
Review pricing, feature coverage, ratings, and similar tools on this page before visiting the product site.
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