--- title: "Evaluate LLMs and RAG a practical example using Langchain and Hugging Face" url: https://daily.dev/posts/evaluate-llms-and-rag-a-practical-example-using-langchain-and-hugging-face-qhnom7rxm source_url: https://www.philschmid.de/evaluate-llm type: article source: "Philipp Schmid" published: 2026-05-31T07:41:27.649Z updated: 2026-05-31T07:59:52.207Z tags: ["llm", "rag", "langchain"] reading_time: 7 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Evaluate LLMs and RAG a practical example using Langchain and Hugging Face **[Philipp Schmid](https://daily.dev/sources/philschmid)** · 7 min read · 0 upvotes · 0 comments ## Summary A hands-on guide to evaluating LLMs and RAG pipelines using Langchain and Hugging Face. Covers three main evaluation approaches: criteria-based evaluation (conciseness, correctness, custom criteria), RAG evaluation using Langchain's ContextQAEvalChain, and pairwise comparison/scoring. Uses Llama-2-70B as the model under evaluation and GPT-4 as the judge, demonstrating the LLM-as-a-judge paradigm. Includes code examples for each method and discusses trade-offs between human evaluation and automated LLM-based evaluation. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Evaluating Your RAG Solution](https://daily.dev/posts/evaluating-your-rag-solution-ixqhywzb8) · Towards Data Science · 1 upvotes · 0 comments - [LLM Evaluation Frameworks Compared: How to Actually Measure What Your Model Does](https://daily.dev/posts/llm-evaluation-frameworks-compared-how-to-actually-measure-what-your-model-does-6v7n6pdrl) · Machine Learning Mastery · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#rag](https://daily.dev/tags/rag), [#langchain](https://daily.dev/tags/langchain) [View this post on daily.dev](https://daily.dev/posts/evaluate-llms-and-rag-a-practical-example-using-langchain-and-hugging-face-qhnom7rxm)