Best LLM evaluation tool

Combined ranking

1. 1
   Braintrust▲117 pts

   GPT #2Claude #2Gemini #1Grok #2

   Unmatched execution speed, enterprise-grade scalability, and a superb developer UX that seamlessly combines automated evaluations with human-in-the-loop annotation and dataset curation.

   To stay #1 Lower the expensive entry pricing barrier to make the cloud platform accessible to early-stage startups and individual developers.

2. 2
   LangSmith▲113 pts

   GPT #1Claude #1Gemini —Grok #3

   Best all-around LLM app evaluation platform: tight tracing-to-dataset workflow, offline and online evals, human review queues, LLM-as-judge support, regression testing, and strong LangChain/LangGraph ecosystem pull.

   To rank higher Make it feel less tied to the LangChain worldview and smoother for fully framework-agnostic teams.

3. 3
   DeepEval▼210 pts

   GPT —Claude #5Gemini #2Grok #1

   Broadest research-backed metrics (50+ including advanced LLM-as-judge), pytest-native CI/CD integration, and top-tier support for agent tool-use/multi-turn evals with easy custom metrics.

   To rank higher Add deeper native production tracing and real-time observability dashboards without relying on the companion platform.

4. 4
   Arize Phoenix▲17 pts

   GPT #3Claude #3Gemini —Grok #5

   Strong open-source observability plus evals, especially for RAG and agents; excellent tracing, span-level debugging, retrieval evaluation, and a credible path from local dev to enterprise Arize workflows.

   To rank higher Tighten the end-to-end eval authoring and product polish so it competes with LangSmith/Braintrust as a primary eval workbench.

5. 5
   Langfuse▼17 pts

   GPT —Claude #4Gemini #3Grok #4

   Outstanding open-source observability platform that binds production traces directly to prompt versions and evaluation scores, enabling continuous real-world grading.

   To rank higher Expand the library of built-in evaluation metrics to reduce the need for writing custom Python scripts or external LLM-as-a-judge templates.

6. 6
   Promptfoonew3 pts

   GPT #5Claude —Gemini #4Grok —

   Extremely fast, local-first CLI tool that is the gold standard for rapid prompt iteration, regression testing, and built-in red-teaming/security scanning.

   To rank higher Add native support for cloud-synchronized test histories and dataset sharing without relying on self-managed configurations or paid enterprise add-ons.

7. 7
   Galileonew2 pts

   GPT #4Claude —Gemini —Grok —

   Strong enterprise LLM quality platform with useful hallucination, RAG, prompt, and production monitoring workflows; good for teams that want packaged quality signals rather than building every scorer themselves.

   To rank higher Become more transparent and developer-accessible with stronger open-source/local workflows and clearer reproducibility.

8. 8
   RRagasnew1 pts

   GPT —Claude —Gemini #5Grok —

   The industry-standard open-source framework specialized in Retrieval-Augmented Generation (RAG) pipelines, offering precise metrics for faithfulness, answer relevance, and context recall.

   To rank higher Expand its native metrics beyond RAG to support complex agentic behaviors, multi-turn tool usage, and general chat applications.

Rank history

By model

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously