These tools integrates with

LiteLLMvsOpenAI API

Universal LLM proxy — 100+ models, one API versus GPT-5 era models, embeddings, and Responses API from OpenAI

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Choose LiteLLM when…

  • •You want a unified API across 100+ LLM providers
  • •You're switching between providers or running A/B tests
  • •You need fallbacks and load balancing across models

Choose OpenAI API when…

  • •You need the broadest ecosystem and most integrations
  • •GPT-4 or o-series reasoning models are required
  • •Assistants API, fine-tuning, or batch API are needed

Side-by-side comparison

Field
LiteLLM
OpenAI API
Category
LLM Infrastructure
LLM Infrastructure
Type
Open Source
Commercial
Free Tier
✓ Yes
✗ No
Pricing Plans
Enterprise: Custom
API: Per token
GitHub Stars
⭐ 16,000
—
Health
●90 — Active
—

LiteLLM

OSS proxy that normalizes 100+ LLMs to the OpenAI format. Add routing, fallbacks, caching, and cost tracking in one layer.

Website ↗GitHub ↗

OpenAI API

API access to GPT-5, GPT-5.5, o3/o4 reasoning models, and the Responses API; plus embeddings, image, audio, and Realtime endpoints. The most widely deployed LLM API in production.

Website ↗

Shared Connections16 tools both integrate with

CrewAILangChainAutoGenLlamaIndexAgnoPortKeyLangfuseHeliconeGroqTogether AIAnthropic APIMistral APICohere APIVercel AI SDKGuardrails AICloudflare AI Gateway

Only LiteLLM (21)

ContinueAiderClaude CodeOpenHandsPlandexLangGraphSemantic KernelDSPyDifyn8n

Only OpenAI API (23)

PydanticAIsmolagentsMastraLiteLLMPromptFooDeepEvalManus AIStainlessLettaGoogle Gemini API

Explore the full AI landscape

See how LiteLLM and OpenAI API fit into the bigger picture — 235 tools, 543 relationships, all mapped.

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