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LLM Evals
Methodology

TruLens vs Vellum

TRTruLensvsVEVellum
TruLensVellum
47%
53%

Leading: Vellum (52.8%)

Statistics

MetricValue
TruLens wins17
Vellum wins19
Abstains (no tool)183
Other tool chosen3603
Decisive cases36
TruLens win rate (unweighted)47.2%
95% CI32.0% - 63.0%
TruLens win rate (weighted)47.2%

Comments

TruLens

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Vellum

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Per-model breakdown

ModelTierTruLensVellumNoneOtherA rate
Devstral 2 2512Mid018141450%
Mistral Small 4Mid1003176100%
DeepSeek R1 0528Frontier409191100%
Gemini 2.5 ProFrontier3011188100%
MiMo V2 ProFrontier0181230%
Claude Haiku 4.5Small003191n/a
Claude Opus 4.6Frontier000132n/a
Claude Opus 4.8Frontier00665n/a
Claude Sonnet 4.6Frontier006198n/a
DeepSeek V3.2Mid0022106n/a
DeepSeek V4 FlashMid00467n/a
DeepSeek V4 ProFrontier00270n/a
Gemini 2.5 FlashSmall001126n/a
Gemini 3.5 FlashSmall00765n/a
GLM 5 TurboFrontier0019113n/a
GLM 5.2Frontier00072n/a
GPT 5.3 CodexFrontier000204n/a
GPT 5.4Frontier000132n/a
GPT 5.4 MiniMid008193n/a
GPT 5.5Frontier00270n/a
Kimi K2.5Frontier003116n/a
Kimi K2.7 CodeFrontier00170n/a
Llama 4 MaverickFrontier0012177n/a
Llama 4 ScoutSmall0020165n/a
MiMo V2.5 ProFrontier00863n/a
MiniMax M2.7Frontier005124n/a
MiniMax M3Frontier00567n/a
Qwen3 Coder NextMid004194n/a

Per-prompt breakdown

PromptTierTruLensVellumNoneOtherA rate
ai-support-agent-platformIntermediate311650221%
ai-agent-applicationAdvanced400108100%
ai-revenue-ops-copilotBeginner221151150%
ai-support-agent-platformBeginner04734500%
ai-revenue-ops-copilotIntermediate12451533%
ai-agent-applicationBeginner202592100%
ai-agent-applicationIntermediate201110100%
ai-engineering-workflowIntermediate101110100%
ai-revenue-ops-copilotAdvanced103510100%
ai-support-agent-platformAdvanced105521100%
ai-engineering-workflowAdvanced001111n/a
ai-engineering-workflowBeginner005363n/a