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 CodeCursorDifyLangSmithOpenAI APIBraintrustArize PhoenixLangGraphOpenHandsRAGAS
Only OpenAI API (27)
PydanticAIsmolagentsLangfuseMistral APICohere APIGroqTogether AIAnthropic APIManus AIStainless
Explore the full AI landscape
See how Langfuse and OpenAI API fit into the bigger picture — 256 tools, 553 relationships, all mapped.