OpenAI Responses API vs OpenAI Tool Search
A side-by-side comparison to help you choose the right tool.
87
OpenAI Responses API scores higher overall (87/100)
But the best choice depends on your specific needs. Compare below.
| Feature | OpenAI Responses API | OpenAI Tool Search |
|---|---|---|
| Our score | 87 | 78 |
| Pricing | Usage-based API pricing; costs depend on the models and tools you use. | Included within supported OpenAI API workflows and priced through the underlying model/tool usage. |
| Free plan | No | No |
| Best for | Product teams building assistants or agents on OpenAI, Developers migrating from older endpoint patterns, Apps that need streaming and tool invocation in one API | Developers building agents with many available tools, Teams trying to reduce brittle tool selection logic, Experiments in more autonomous agent orchestration |
| Platforms | api | api |
| API | Yes | Yes |
| Languages | en | en |
| Pros |
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| Cons |
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| Visit site | Visit site |
- Pricing
- Usage-based API pricing; costs depend on the models and tools you use.
- Free plan
- No
- Best for
- Product teams building assistants or agents on OpenAI, Developers migrating from older endpoint patterns, Apps that need streaming and tool invocation in one API
- Platforms
- api
- API
- Yes
- Languages
- en
- Pricing
- Included within supported OpenAI API workflows and priced through the underlying model/tool usage.
- Free plan
- No
- Best for
- Developers building agents with many available tools, Teams trying to reduce brittle tool selection logic, Experiments in more autonomous agent orchestration
- Platforms
- api
- API
- Yes
- Languages
- en
87Choose OpenAI Responses API if:
- You are Product teams building assistants or agents on OpenAI
- You are Developers migrating from older endpoint patterns
- You are Apps that need streaming and tool invocation in one API
78Choose OpenAI Tool Search if:
- You are Developers building agents with many available tools
- You are Teams trying to reduce brittle tool selection logic
- You are Experiments in more autonomous agent orchestration
FAQ
- What is the difference between OpenAI Responses API and OpenAI Tool Search?
- OpenAI Responses API is openai's newer response-oriented api surface for building assistants and agents with streaming, tools, and model control. OpenAI Tool Search is a built-in openai capability for helping models find and select relevant tools more reliably inside agent workflows.
- Which is cheaper, OpenAI Responses API or OpenAI Tool Search?
- OpenAI Responses API: Usage-based API pricing; costs depend on the models and tools you use.. OpenAI Tool Search: Included within supported OpenAI API workflows and priced through the underlying model/tool usage..
- Who is OpenAI Responses API best for?
- OpenAI Responses API is best for Product teams building assistants or agents on OpenAI, Developers migrating from older endpoint patterns, Apps that need streaming and tool invocation in one API.
- Who is OpenAI Tool Search best for?
- OpenAI Tool Search is best for Developers building agents with many available tools, Teams trying to reduce brittle tool selection logic, Experiments in more autonomous agent orchestration.