For evaluating an AI agent's output quality, several platforms do this job. MLflow offers evaluation within its open-source agent platform 111, Langfuse runs evals alongside tracing 212, and Arize provides LLM-as-judge evaluators and experiments 313. Confident AI and DeepEval cover agent evaluation and iterative improvement 919, and Harbor evaluates sandboxed agents 717.
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MLflowmlflow.orgverified and signed
Open-source AI engineering platform whose agent-evaluation skill evaluates and improves an existing LLM agent's output quality, including tool selection accuracy 11.
+6 community tools built for it
for agents: agent-evaluation · mlflow · mlflow-agent
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Sources
- 1MLflow - Open Source AI Platform for Agents, LLMs & Modelsmlflow.org · read 2026-10-29
- 2Langfuse: Open Source Agent Evals & Observabilitylangfuse.com · read 2026-10-29
- 3Agent Observability, Evaluation & Improvement Platform | Arize AIarize.com · read 2026-10-30
- 7Harborharborframework.com · read 2026-10-30
- 9Confident AI: Enterprise AI Evaluation & Observability Platformconfident-ai.com · read 2026-10-30
- 11agent-evaluation: declares "agent-evaluation" (the record we read and signed)unfragile.ai · read 2026-10-24
- 12langfuse: declares "langfuse" (the record we read and signed)unfragile.ai · read 2026-10-24
- 13arize-evaluator: declares "arize-evaluator" (the record we read and signed)unfragile.ai · read 2026-10-24
- 17create-task: declares "create-task" (the record we read and signed)unfragile.ai · read 2026-10-24
- 19deepeval: declares "deepeval" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
agent-evaluation · agent-evaluation verified and signed
Use this when you need to EVALUATE OR IMPROVE or OPTIMIZE an existing LLM agent's output quality - including improving tool selection accuracy, answer quality, reducing costs, or fixing issues where the agent gives wrong/incomplete responses. Evaluates agents systematically using MLflow evaluation w
langfuse · langfuse verified and signed
Skills for working with Langfuse, the open-source LLM engineering platform for tracing, prompt management, and evaluation.
arize-evaluator · arize-evaluator verified and signed
Handles LLM-as-judge and code evaluator workflows on Arize including creating/updating evaluators, running evaluations on spans or experiments, managing tasks, trigger-run operations, column mapping, and continuous monitoring. Use when the user mentions create evaluator, LLM judge, code evaluator, h
phoenix-evals · phoenix-evals verified and signed
Build, run, and validate evaluators for AI/LLM applications with Phoenix, in Python or TypeScript (including Vercel AI SDK apps) — code-based checks and LLM-as-a-judge, run over exported traces or dataframes or as Phoenix experiments, gate them in CI, and validate judges against human-labeled data.
agentic-eval · agentic-eval verified and signed
Patterns and techniques for evaluating and improving AI agent outputs. Use this skill when: - Implementing self-critique and reflection loops - Building evaluator-optimizer pipelines for quality-critical generation - Creating test-driven code refinement workflows - Designing rubric-based or LLM-as-j
evalgate_compare_models · evalgate found in code, not yet checked
Run an A/B benchmark shootout comparing two LLMs on the same evaluation suite.
· agentclash website read, tools not yet checked
Build, replay, score, and regression-test AI agents with open-source evals, traces, benchmarks, and CI gates. A LangSmith alternative for agent workflow testing and prompt regression testing.
create-task · create-task verified and signed
Create a new Harbor task for evaluating agents. Use when the user wants to scaffold, build, or design a new task, benchmark problem, or eval. Guides through instruction writing, environment setup, verifier design (pytest vs Reward Kit vs custom), and solution scripting.
evaluate_with_llm_judge · iris-eval/mcp-server found in code, not yet checked
deepeval · deepeval verified and signed
DeepEval evaluation workflow for AI agents and LLM applications. TRIGGER when the user wants to evaluate or improve an AI agent, tool-using workflow, multi-turn chatbot, RAG pipeline, or LLM app; add evals; generate datasets or goldens; use deepeval generate; use deepeval test run; send results to C
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.