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Nov 3, 2025
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Remove deadlink #1258

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2 changes: 1 addition & 1 deletion src/langsmith/evaluation-concepts.mdx
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Expand Up @@ -110,7 +110,7 @@ Learn about [how to define an LLM-as-a-judge evaluator](/langsmith/llm-as-judge)

### Pairwise

Pairwise evaluators allow you to compare the outputs of two versions of an application. Think [LMSYS Chatbot Arena](https://chat.lmsys.org/) - this is the same concept, but applied to AI applications more generally, not just models! This can use either a heuristic ("which response is longer"), an LLM (with a specific pairwise prompt), or human (asking them to manually annotate examples).
Pairwise evaluators allow you to compare the outputs of two versions of an application. This can use either a heuristic ("which response is longer"), an LLM (with a specific pairwise prompt), or human (asking them to manually annotate examples).

**When should you use pairwise evaluation?**

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