# LM Evaluation Harness vs Patronus AI

**Leader by Vioscale score:** Patronus AI

| Attribute | LM Evaluation Harness | Patronus AI |
|---|---|---|
| **Vioscale score** | 53.7 (40% (low)) | 69 (37% (low)) |
| activity.commits_last_30d | 50 | - |
| adoption.dependent_repos | 252 | - |
| adoption.github_stars | 13,802 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"hybrid":true,"on_prem":true}` |
| description.long | A Python-based evaluation framework that enables testing of language models against 60+ standard academic benchmarks with support for various model formats, APIs, and custom evaluation metrics. | A managed platform that evaluates language models and AI agents using specialized scoring models, provides adversarial test datasets, monitors performance in production, and enables side-by-side comparison and debugging of AI systems at scale. |
| features.capabilities | `{"pricing_model":"free_open_source","architecture_model":"open_source_cli","multi_model_side_by_side_ab_regression_testing":true}` | `{"pricing_model":"per_test_execution_cloud","architecture_model":"managed_enterprise_saas","mit_or_apache_permissive_oss_license":false,"llm_as_a_judge_prompt_grading_framework":true,"dashboard_analytics_for_metric_drift_over_time":true,"multi_model_side_by_side_ab_regression_testing":true,"red_teaming_and_adversarial_vulnerability_scanning":true,"specialized_rag_metrics_faithfulness_context_relevance":true}` |
| integrations.count | 5 | 5 |
| integrations.list | `[{"name":"Hugging Face"},{"name":"PyTorch"},{"name":"VLLM"},{"name":"GitHub"},{"name":"OpenAI-compliant APIs"}]` | `[{"name":"Smolagents"},{"name":"OpenAI Agents"},{"name":"Pydantic"},{"name":"CrewAI"},{"name":"Langchain"}]` |
| language.primary | Python | - |
| license.spdx | MIT | - |
| market.availability | - | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-21T11:02:40.793Z"}` | `{"type":"hybrid","plans":[{"free":true,"name":"Developer","summary":"Free with $10 API credits","features":["$10 in free credits","Patronus Experiments (last 2 weeks)","Patronus Comparisons","Patronus Datasets","Optional Patronus API"],"components":[{"kind":"one_time","amount":10,"currency":"USD"}],"description":"Free tier for API evaluation","contactSales":false},{"free":true,"name":"Individual","summary":"Free tier with 20 pages","features":["20 pages","Customizable options","Secure data storage","Email support"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Free platform tier","contactSales":false,"includedLimits":{"pages":"20"}},{"free":false,"name":"Base","summary":"$25/month for 600 pages","features":["600 pages","Page add-ons available","24/7 customer support","Analytics and reporting","Account Management"],"components":[{"kind":"fixed","amount":25,"period":"month","currency":"USD"}],"description":"Professional plan","contactSales":false,"includedLimits":{"pages":"600"}},{"free":false,"name":"Enterprise","summary":"Custom pricing, unlimited usage, enterprise deployment options","features":["Unlimited pages and runs","On-premise or dedicated VPC deployment","Custom data retention","SSO","Premium Platform Features (Evaluation Runs, webhooks)","Premium API Features (higher rate limits, volume discounts)","Custom eval model fine-tuning","Eval dataset generation"],"description":"Custom enterprise solution with security and AI services","contactSales":true,"includedLimits":{"pages":"Unlimited"}}],"addOns":[{"name":"API - Small Evaluator","components":[{"per":{"qty":1000,"unit":"calls"},"kind":"metered","amount":10,"period":"month","currency":"USD"}]},{"name":"API - Large Evaluator","components":[{"per":{"qty":1000,"unit":"calls"},"kind":"metered","amount":20,"period":"month","currency":"USD"}]},{"name":"API - Eval Explanations","components":[{"per":{"qty":1000,"unit":"calls"},"kind":"metered","amount":20,"period":"month","currency":"USD"}]}],"summary":"Free tiers available ($0/mo), paid plan from $25/mo, API pricing from $10/1k calls","currency":"USD","freeTier":true,"sourceUrl":"https://patronus.ai/pricing","retrievedAt":"2026-08-21T10:57:53.715Z","startingPrice":{"amount":25,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | mid |
| pricing.starting_price | - | `{"amount":25,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | 66 | - |
| release.history | `[{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.12","date":"2026-05-11T13:04:19Z","type":"stable","version":"v0.4.12"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.11","date":"2026-02-13T20:21:47Z","type":"stable","version":"v0.4.11"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.10","date":"2026-01-27T19:56:53Z","type":"stable","version":"v0.4.10"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.9.2","date":"2025-11-26T23:27:06Z","type":"stable","version":"v0.4.9.2"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.9.1","date":"2025-08-04T11:36:05Z","type":"stable","version":"v0.4.9.1"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.9","date":"2025-06-19T14:18:27Z","type":"stable","version":"v0.4.9"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.8","date":"2025-03-05T07:49:46Z","type":"stable","version":"v0.4.8"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.7","date":"2024-12-17T10:37:09Z","type":"stable","version":"v0.4.7"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.6","date":"2024-11-25T13:38:29Z","type":"stable","version":"v0.4.6"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.5","date":"2024-10-08T21:06:05Z","type":"stable","version":"v0.4.5"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.4","date":"2024-09-05T15:13:13Z","type":"stable","version":"v0.4.4"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.3","date":"2024-07-01T14:00:36Z","type":"stable","version":"v0.4.3"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.2","date":"2024-03-18T13:07:28Z","type":"stable","version":"v0.4.2"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.1","date":"2024-01-31T15:29:14Z","type":"stable","version":"v0.4.1"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.4.0","date":"2023-12-04T15:08:53Z","type":"stable","version":"v0.4.0"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.3.0","date":"2022-12-08T08:34:37Z","type":"stable","version":"v0.3.0"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.2.0","date":"2022-03-07T02:12:23Z","type":"stable","version":"v0.2.0"},{"url":"https://github.com/EleutherAI/lm-evaluation-harness/releases/tag/v0.0.1","date":"2021-09-02T02:28:08Z","type":"stable","version":"v0.0.1"}]` | - |
| security.gdpr | - | yes |
| security.scorecard | 5.6 | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=lm-eval&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (AI Evals Testing)

| Capability | LM Evaluation Harness | Patronus AI |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Open source CLI | Managed enterprise saas |
| LLM as a judge prompt grading framework | - | ✓ |
| Specialized rag metrics faithfulness context relevance | - | ✓ |
| Deterministic regex and json schema assertions | - | - |
| Synthetic test dataset generation from documents | - | - |
| Ci cd github actions pipeline blocking gates | - | - |
| Red teaming and adversarial vulnerability scanning | - | ✓ |
| Multi model side by side ab regression testing | ✓ | ✓ |
| Human in the loop hitl annotation UI | - | - |
| Dashboard analytics for metric drift over time | - | ✓ |
| SOC2 type ii | - | - |
| Mit or apache permissive oss license | - | ✗ |
| Pricing model | Free open source | Per test execution cloud |

*Source: Vioscale. Generated 2026-09-01T17:00:49.680Z. "-" = undocumented, not absent.*