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Agent Frameworks
Methodology

LlamaIndex vs LangChain

LLLlamaIndexvsLangChainLALangChain
LlamaIndexLangChain
4%
96%

Leading: LangChain (95.6%)

Statistics

MetricValue
LlamaIndex wins7
LangChain wins151
Abstains (no tool)1
Other tool chosen254
Decisive cases158
LlamaIndex win rate (unweighted)4.4%
95% CI2.2% - 8.9%
LlamaIndex win rate (weighted)4.4%

Comments

LlamaIndex

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LangChain

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Per-model breakdown

ModelTierLlamaIndexLangChainNoneOtherA rate
Gemini 2.5 ProFrontier021000%
Llama 4 MaverickFrontier021000%
Llama 4 ScoutSmall4160120%
DeepSeek R1 0528Frontier020100%
Qwen3 Coder NextMid017040%
DeepSeek V4 ProFrontier012090%
Devstral 2 2512Mid012030%
DeepSeek V4 FlashMid011090%
MiMo V2.5 ProFrontier2501429%
Claude Sonnet 4.6Frontier070140%
MiniMax M3Frontier040170%
Mistral Small 4Mid030180%
GLM 5.2Frontier1101950%
Claude Haiku 4.5Small010200%
Claude Opus 4.8Frontier00021n/a
Gemini 3.5 FlashSmall00021n/a
GPT 5.3 CodexFrontier00021n/a
GPT 5.4 MiniMid00021n/a
GPT 5.5Frontier00021n/a
Kimi K2.7 CodeFrontier00021n/a

Per-prompt breakdown

PromptTierLlamaIndexLangChainNoneOtherA rate
ai-agent-applicationBeginner76206910%
ai-agent-applicationIntermediate0481890%
ai-agent-applicationAdvanced0410960%