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LLM Evals
Methodology

Vellum vs TruLens

VEVellumvsTRTruLens
VellumTruLens
45%
55%

Leading: TruLens (54.8%)

Statistics

MetricValue
Vellum wins19
TruLens wins23
Abstains (no tool)237
Other tool chosen4249
Decisive cases42
Vellum win rate (unweighted)45.2%
95% CI31.2% - 60.1%
Vellum win rate (weighted)45.2%

Comments

Vellum

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TruLens

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Model range breakdown

Model rangeTierVellumTruLensNoneOtherA rate
DeepSeek Flash 3.2–4.1Mid0026210n/a
DeepSeek Pro 4–4 0813Frontier002106n/a
DeepSeek R1Frontier04122240%
DevstralMid1821916290%
Gemini Flash 2.5–3.8Small0012223n/a
Gemini Pro 2.5–3.1 PreviewFrontier03172180%
GLM 5 Turbo–5.3Frontier0019221n/a
GPT 5.4–6 AstraFrontier005235n/a
GPT Coding 5.3 Codex–6.1 SolFrontier002238n/a
GPT Mini 5.4 Mini–6 LunaMid009228n/a
HaikuSmall004227n/a
Kimi 2.5–3Frontier005221n/a
Llama MaverickFrontier0018213n/a
Llama ScoutSmall0029185n/a
MiMo Pro 2–2.6Frontier1017221100%
MiniMax M 2.7–3Frontier0012224n/a
Mistral SmallMid01452070%
Opus 4.6–5.5Frontier009230n/a
Qwen CoderMid004227n/a
Sonnet 4.6–5.5Frontier0011229n/a

Per-prompt breakdown

PromptTierVellumTruLensNoneOtherA rate
ai-support-agent-platformIntermediate113656079%
ai-agent-applicationAdvanced0601670%
ai-support-agent-platformBeginner4080500100%
ai-revenue-ops-copilotBeginner221356750%
ai-agent-applicationBeginner04401340%
ai-agent-applicationIntermediate0411700%
ai-revenue-ops-copilotIntermediate21557267%
ai-engineering-workflowIntermediate0111710%
ai-revenue-ops-copilotAdvanced0135700%
ai-support-agent-platformAdvanced0155810%
ai-engineering-workflowAdvanced001167n/a
ai-engineering-workflowBeginner008290n/a