These tools integrates with

OpenAI APIvsLangfuse

GPT-4o, o1, and embeddings from OpenAI versus OSS LLM engineering platform

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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 Langfuse when…

  • •You want open-source LLM observability
  • •Self-hosting your tracing stack is important
  • •You need cost tracking across models and users

Side-by-side comparison

Field
OpenAI API
Langfuse
Category
LLM Infrastructure
LLM Infrastructure
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
API: Per token
Cloud: $59/mo
GitHub Stars
—
⭐ 7,000
Health
—
●80 — Active

OpenAI API

API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.

Website ↗

Langfuse

Open-source platform for tracing, evaluations, and prompt management. Self-hostable alternative to LangSmith with clean UX.

Website ↗GitHub ↗

Shared Connections12 tools both integrate with

CrewAILlamaIndexAutoGenAgnoLangChainLiteLLMHeliconeMastraPortKeyPromptFooDeepEvalVercel AI SDK

Only OpenAI API (18)

PydanticAIsmolagentsLangfuseAnthropic APIMistral APICohere APIGroqTogether AILettaGoogle Gemini API

Only Langfuse (18)

Claude CodeLangGraphCursorOpenHandsDifyLangSmithRAGASOpenAI APIBraintrustArize Phoenix

Explore the full AI landscape

See how OpenAI API and Langfuse fit into the bigger picture — 207 tools, 452 relationships, all mapped.

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