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LLM Observability
Methodology

LangSmith vs Langfuse

LangSmithLALangSmithvsLangfuseLALangfuse
LangSmithLangfuse
67%
33%

Leading: LangSmith (67.5%)

Statistics

MetricValue
LangSmith wins1341
Langfuse wins646
Abstains (no tool)45
Other tool chosen441
Decisive cases1987
LangSmith win rate (unweighted)67.5%
95% CI65.4% - 69.5%
LangSmith win rate (weighted)67.5%

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LangSmith

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Langfuse

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Per-model breakdown

ModelTierLangSmithLangfuseNoneOtherA rate
GLM 5 TurboFrontier120120091%
Claude Sonnet 4.6Frontier102300077%
Claude Opus 4.6Frontier221100017%
GPT 5.3 CodexFrontier141180011%
GPT 5.4Frontier131190010%
GPT 5.4 MiniMid105231382%
DeepSeek V3.2Mid12070594%
MiMo V2 ProFrontier12512499%
Gemini 2.5 ProFrontier12216399%
DeepSeek R1 0528Frontier1180113100%
Mistral Small 4Mid112401397%
Qwen3 Coder NextMid615511453%
Claude Haiku 4.5Small377901332%
Kimi K2.5Frontier65504057%
MiniMax M2.7Frontier105132199%
Llama 4 MaverickFrontier751104687%
Llama 4 ScoutSmall02411900%
Devstral 2 2512Mid2101590100%
Gemini 2.5 FlashSmall41112680%

Per-prompt breakdown

PromptTierLangSmithLangfuseNoneOtherA rate
ai-support-agent-platformIntermediate2648117077%
ai-revenue-ops-copilotIntermediate2518716474%
ai-support-agent-platformBeginner174159116952%
ai-revenue-ops-copilotAdvanced2329627971%
ai-support-agent-platformAdvanced20611819064%
ai-revenue-ops-copilotBeginner214105296967%