These tools integrates with
LangfusevsOpenAI API
OSS LLM engineering platform (acquired by ClickHouse, Jan 2026) versus GPT-5 era models, embeddings, and Responses API from OpenAI
Compare interactively in Explore →Choose Langfuse when…
- •You want open-source LLM observability
- •Self-hosting your tracing stack is important
- •You need cost tracking across models and users
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
Langfuse
OpenAI API
Category
Observability
LLM Infrastructure
Type
Open Source
Commercial
Free Tier
✓ Yes
✗ No
Pricing Plans
Cloud: $59/mo
API: Per token
GitHub Stars
⭐ 7,000
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Health
●95 — Active
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Langfuse
Open-source platform for tracing, evaluations, and prompt management. Self-hostable alternative to LangSmith with broad framework support. Acquired by ClickHouse in January 2026; OSS core continues with deeper ClickHouse-backed analytics.
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.
Shared Connections12 tools both integrate with
Only Langfuse (19)
Claude CodeCursorLangGraphOpenHandsDifyLangSmithRAGASOpenAI APIBraintrustArize Phoenix
Only OpenAI API (27)
PydanticAIsmolagentsLangfuseAnthropic APIMistral APICohere APIGroqTogether AIManus AIStainless
Explore the full AI landscape
See how Langfuse and OpenAI API fit into the bigger picture — 235 tools, 543 relationships, all mapped.