Best LLM Evaluation Tools in 2026
Updated
29 LLM evaluation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
29ranked
0free plans on this page
8 Oct 2026last checked
Input list LLM Evaluation Tools 4 channels on this page · 11 of 32 spec lines stated by the makers
Ch Tool Free planPaid fromDeployment optionsCustom metricsLLM-as-a-judgeSafety evaluationsHuman review workflowsPrompt versioning Spec sheet Score
26 SWE-bench Free planYesPaid fromnot statedDeployment optionsbothCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 5.9
27 Parler-TTS Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 3/8spec lines stated 5.8
28 PyRIT Free plannot statedPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 4/8spec lines stated 5.8
29 AgentBench Free planYesPaid fromnot statedDeployment optionsself-hostedCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 5.6
Compare all 4 in a table
| # | Tool | Score | Free plan | Free plan | Paid from | Deployment options | Custom metrics |
|---|---|---|---|---|---|---|---|
| 26 | SWE-bench | 5.9 | No | Yes | — | both | — |
| 27 | Parler-TTS | 5.8 | No | — | — | self-hosted | Yes |
| 28 | PyRIT | 5.8 | No | — | — | both | Yes |
| 29 | AgentBench | 5.6 | No | Yes | — | self-hosted | — |
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