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LLM Evals
Methodology

LMSYS Chatbot Arena vs TruEra

LMLMSYS Chatbot ArenavsTRTruEra
LMSYS Chatbot ArenaTruEra
48%
52%

Leading: TruEra (51.6%)

Statistics

MetricValue
LMSYS Chatbot Arena wins15
TruEra wins16
Abstains (no tool)237
Other tool chosen4260
Decisive cases31
LMSYS Chatbot Arena win rate (unweighted)48.4%
95% CI32.0% - 65.2%
LMSYS Chatbot Arena win rate (weighted)48.4%

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LMSYS Chatbot Arena

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TruEra

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Model range breakdown

Model rangeTierLMSYS Chatbot ArenaTruEraNoneOtherA rate
DeepSeek Flash 3.2–4.1Mid0026210n/a
DeepSeek Pro 4–4 0813Frontier002106n/a
DeepSeek R1Frontier01122270%
DevstralMid01191810%
Gemini Flash 2.5–3.8Small0012223n/a
Gemini Pro 2.5–3.1 PreviewFrontier01172200%
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 ScoutSmall15029170100%
MiMo Pro 2–2.6Frontier0017222n/a
MiniMax M 2.7–3Frontier0012224n/a
Mistral SmallMid01352080%
Opus 4.6–5.5Frontier009230n/a
Qwen CoderMid004227n/a
Sonnet 4.6–5.5Frontier0011229n/a

Per-prompt breakdown

PromptTierLMSYS Chatbot ArenaTruEraNoneOtherA rate
ai-agent-applicationIntermediate37116430%
ai-support-agent-platformAdvanced41557780%
ai-support-agent-platformIntermediate22657050%
ai-revenue-ops-copilotBeginner211356867%
ai-revenue-ops-copilotAdvanced12356833%
ai-revenue-ops-copilotIntermediate11557350%
ai-agent-applicationAdvanced0201710%
ai-engineering-workflowAdvanced101166100%
ai-engineering-workflowIntermediate101171100%
ai-agent-applicationBeginner0040138n/a
ai-engineering-workflowBeginner008290n/a
ai-support-agent-platformBeginner0080504n/a