LM Evaluation Harness vs Patronus AI
No leader: the top candidate Patronus AI has only 0.30 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for ai evals testing. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
LM Evaluation Harness
A framework for conducting few-shot evaluation of language models against various tasks and benchmarks. Supports multiple model backends, custom evaluation metrics, and extensible task definitions for assessing model capabilities and performance.
Patronus AI
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.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Patronus AI
Free tiers available ($0/mo), paid plan from $25/mo, API pricing from $10/1k calls
- DeveloperFree
- $10 in free credits
- Patronus Experiments (last 2 weeks)
- Patronus Comparisons
- Patronus Datasets
- Optional Patronus API
- IndividualFree
- 20 pages
- Customizable options
- Secure data storage
- Email support
- Base$25/month for 600 pages
- 600 pages
- Page add-ons available
- 24/7 customer support
- Analytics and reporting
- Account Management
- EnterpriseContact sales
- Unlimited pages and runs
- On-premise or dedicated VPC deployment
- Custom data retention
- SSO
- Premium Platform Features (Evaluation Runs, webhooks)
- +3 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
LM Evaluation Harness
- Hugging Face
- PyTorch
- VLLM
- GitHub
- OpenAI-compliant APIs
Patronus AI
- Smolagents
- OpenAI Agents
- Pydantic
- CrewAI
- Langchain
LM Evaluation Harness or Patronus AI: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.