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LLM Evals
Methodology

Langfuse vs Weights & Biases

LangfuseLALangfusevsWeights & BiasesWEWeights & Biases
LangfuseWeights & Biases
44%
56%

Leading: Weights & Biases (56.3%)

Statistics

MetricValue
Langfuse wins93
Weights & Biases wins120
Abstains (no tool)216
Other tool chosen3852
Decisive cases213
Langfuse win rate (unweighted)43.7%
95% CI37.2% - 50.4%
Langfuse win rate (weighted)43.7%

Comments

Langfuse

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Weights & Biases

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Model range breakdown

Model rangeTierLangfuseWeights & BiasesNoneOtherA rate
DeepSeek Flash 3.2–4.1Mid5026192100%
DeepSeek Pro 4–4 0813Frontier10293100%
DeepSeek R1Frontier010112070%
DevstralMid034171380%
Gemini Flash 2.5–3.8Small041101720%
Gemini Pro 2.5–3.1 PreviewFrontier411420780%
GLM 5 Turbo–5.3Frontier1019208100%
GPT 5.4–6 AstraFrontier104223100%
GPT Coding 5.3 Codex–6.1 SolFrontier001227n/a
GPT Mini 5.4 Mini–6 LunaMid91820790%
HaikuSmall504209100%
Kimi 2.5–3Frontier005209n/a
Llama MaverickFrontier1016194100%
Llama ScoutSmall6232614921%
MiMo Pro 2–2.6Frontier2101719817%
MiniMax M 2.7–3Frontier0012213n/a
Mistral SmallMid203208100%
Opus 4.6–5.5Frontier1308206100%
Qwen CoderMid2604190100%
Sonnet 4.6–5.5Frontier1709202100%

Per-prompt breakdown

PromptTierLangfuseWeights & BiasesNoneOtherA rate
ai-support-agent-platformBeginner33127744373%
ai-revenue-ops-copilotAdvanced03635140%
ai-support-agent-platformAdvanced721553325%
ai-revenue-ops-copilotIntermediate1015453240%
ai-support-agent-platformIntermediate1014653142%
ai-revenue-ops-copilotBeginner6141253130%
ai-engineering-workflowIntermediate103113677%
ai-engineering-workflowAdvanced55113850%
ai-engineering-workflowBeginner607275100%
ai-agent-applicationBeginner4034120100%
ai-agent-applicationAdvanced100150100%
ai-agent-applicationIntermediate101149100%