These tools integrates with

OpenAI APIvsLiteLLM

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

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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

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

Side-by-side comparison

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

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 ↗

LiteLLM

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

Website ↗GitHub ↗

Shared Connections16 tools both integrate with

CrewAIAutoGenLlamaIndexLangChainAgnoPortKeyLangfuseHeliconeAnthropic APIMistral APICohere APIGroqTogether AIVercel AI SDKGuardrails AICloudflare AI Gateway

Only OpenAI API (23)

PydanticAIsmolagentsMastraLiteLLMPromptFooDeepEvalManus AIStainlessLettaGoogle Gemini API

Only LiteLLM (21)

ContinueAiderClaude CodeOpenHandsPlandexLangGraphSemantic KernelDSPyDifyn8n

Explore the full AI landscape

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

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