LiteLLM vs OpenAI Responses API
A side-by-side comparison to help you choose the right tool.
89
LiteLLM scores higher overall (89/100)
But the best choice depends on your specific needs. Compare below.
| Feature | LiteLLM | OpenAI Responses API |
|---|---|---|
| Our score | 89 | 87 |
| Pricing | Open-source core; paid or managed offerings vary by vendor and deployment path. | Usage-based API pricing; costs depend on the models and tools you use. |
| Free plan | Yes | No |
| Best for | Platform teams managing multiple LLM vendors, Teams that need routing, cost tracking, and guardrails, Developers tired of rewriting provider-specific integrations | 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 | mac, windows, linux, api | api |
| API | Yes | Yes |
| Languages | en | en |
| Pros |
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| Cons |
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| Visit site | Visit site |
LiteLLM
89
- Pricing
- Open-source core; paid or managed offerings vary by vendor and deployment path.
- Free plan
- Yes
- Best for
- Platform teams managing multiple LLM vendors, Teams that need routing, cost tracking, and guardrails, Developers tired of rewriting provider-specific integrations
- Platforms
- mac, windows, linux, api
- API
- Yes
- Languages
- en
- 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
89Choose LiteLLM if:
- You are Platform teams managing multiple LLM vendors
- You are Teams that need routing, cost tracking, and guardrails
- You are Developers tired of rewriting provider-specific integrations
- You want to start free
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
FAQ
- What is the difference between LiteLLM and OpenAI Responses API?
- LiteLLM is an open-source sdk and gateway that standardizes access to many model providers behind an openai-style or native interface. OpenAI Responses API is openai's newer response-oriented api surface for building assistants and agents with streaming, tools, and model control.
- Which is cheaper, LiteLLM or OpenAI Responses API?
- LiteLLM: Open-source core; paid or managed offerings vary by vendor and deployment path.. OpenAI Responses API: Usage-based API pricing; costs depend on the models and tools you use.. LiteLLM has a free plan.
- Who is LiteLLM best for?
- LiteLLM is best for Platform teams managing multiple LLM vendors, Teams that need routing, cost tracking, and guardrails, Developers tired of rewriting provider-specific integrations.
- 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.