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OpenAI
Responses API and Agents SDK
Launched Mar 11, 2025
API building blocks for agents: the Responses API with built-in web search, file search and computer use tools, plus the open-source Agents SDK.
- Surface
- API
- Availability
- Generally available
- Plans
- —
- Retired
- —
Models
Strengths & weaknesses
Strengths
- Built-in web search tool with citations
- File search at $2.50 per 1,000 queries
Weaknesses
- Web search tool in preview at launch
Web search tool available with gpt-4o and gpt-4o-mini at launch.