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LLM Observability
Methodology

LangSmith vs Langfuse

LangSmithLALangSmithvsLangfuseLALangfuse
LangSmithLangfuse
65%
35%

Leading: LangSmith (65.3%)

Statistics

MetricValue
LangSmith wins525
Langfuse wins279
Abstains (no tool)22
Other tool chosen183
Decisive cases804
LangSmith win rate (unweighted)65.3%
95% CI61.9% - 68.5%
LangSmith win rate (weighted)65.3%

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LangSmith

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Langfuse

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Per-model breakdown

ModelTierLangSmithLangfuseNoneOtherA rate
MiMo V2 ProFrontier5310098%
GLM 5 TurboFrontier5040093%
Claude Sonnet 4.6Frontier37170069%
Claude Opus 4.6Frontier7470013%
GPT 5.3 CodexFrontier6480011%
GPT 5.4Frontier351006%
DeepSeek V3.2Mid4930294%
GPT 5.4 MiniMid41101280%
Gemini 2.5 ProFrontier4914098%
DeepSeek R1 0528Frontier48015100%
Claude Haiku 4.5Small14340629%
Kimi K2.5Frontier23241049%
Mistral Small 4Mid4320796%
Qwen3 Coder NextMid24211853%
MiniMax M2.7Frontier40111198%
Llama 4 MaverickFrontier28402288%
Llama 4 ScoutSmall0115350%
Devstral 2 2512Mid90833100%
Gemini 2.5 FlashSmall10052100%

Per-prompt breakdown

PromptTierLangSmithLangfuseNoneOtherA rate
ai-support-agent-platformIntermediate1073412976%
ai-revenue-ops-copilotIntermediate983702973%
ai-support-agent-platformAdvanced864903664%
ai-support-agent-platformBeginner706453052%
ai-revenue-ops-copilotAdvanced864413366%
ai-revenue-ops-copilotBeginner7851152660%