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LLM Evals
Methodology

LangSmith vs Braintrust

LangSmithLALangSmithvsBraintrustBRBraintrust
LangSmithBraintrust
49%
51%

Leading: Braintrust (51.4%)

Statistics

MetricValue
LangSmith wins1224
Braintrust wins1296
Abstains (no tool)194
Other tool chosen1223
Decisive cases2520
LangSmith win rate (unweighted)48.6%
95% CI46.6% - 50.5%
LangSmith win rate (weighted)48.6%

Comments

LangSmith

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Braintrust

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Per-model breakdown

ModelTierLangSmithBraintrustNoneOtherA rate
GPT 5.3 CodexFrontier10199015%
Claude Haiku 4.5Small1816741110%
DeepSeek R1 0528Frontier17401026100%
Claude Sonnet 4.6Frontier779772944%
Gemini 2.5 ProFrontier155194399%
GPT 5.4 MiniMid134685996%
Qwen3 Coder NextMid1390460100%
Mistral Small 4Mid1310362100%
Claude Opus 4.6Frontier11080171%
GPT 5.4Frontier178702216%
Kimi K2.5Frontier0104370%
GLM 5 TurboFrontier1878191119%
MiniMax M2.7Frontier592953067%
GPT 5.5Frontier177331%
DeepSeek V3.2Mid7602225100%
MiniMax M3Frontier268683%
DeepSeek V4 ProFrontier214521632%
Gemini 3.5 FlashSmall0628140%
Kimi K2.7 CodeFrontier1601212%
MiMo V2 ProFrontier59185898%
Claude Opus 4.8Frontier332072362%
GLM 5.2Frontier1510322%
MiMo V2.5 ProFrontier193092539%
Llama 4 MaverickFrontier38014143100%
DeepSeek V4 FlashMid28644582%
Devstral 2 2512Mid9014149100%
Gemini 2.5 FlashSmall301117100%
Llama 4 ScoutSmall0023166n/a

Per-prompt breakdown

PromptTierLangSmithBraintrustNoneOtherA rate
ai-revenue-ops-copilotIntermediate222170412757%
ai-support-agent-platformIntermediate255122514068%
ai-revenue-ops-copilotAdvanced154218214241%
ai-revenue-ops-copilotBeginner1512041115943%
ai-support-agent-platformAdvanced172176517449%
ai-support-agent-platformBeginner1171377519946%
ai-agent-applicationAdvanced305204937%
ai-engineering-workflowAdvanced186115023%
ai-agent-applicationIntermediate334515342%
ai-engineering-workflowIntermediate186015223%
ai-agent-applicationBeginner3728284557%
ai-engineering-workflowBeginner1723613343%