Find the Best LLM Response for Your Data
Cross-evaluate models using LLM-as-a-Judge methodology.
No bias, no guesswork — just consensus.
How It Works
Three steps to finding the best response
Submit, evaluate, review. It's that simple.
01 — Submit Your Query
Enter your prompt with optional context. Select which models to compare from 50+ LLMs via OpenRouter — including models from OpenAI, Anthropic, Google, Meta, and Mistral.
02 — Models Judge Each Other
Each model evaluates the others using your choice of research-based evaluation methods and a custom rubric. Consensus emerges from cross-evaluation, not a single opinion — eliminates single-model bias and gives you choice.
03 — Review & Export Results
Compare ranked responses, see scores and reasoning from each judge. Human feedback (e.g. RL4F) is one of the evaluation methods you can use; when there's a tie we don't reinforce from any method — you stay in control. Export your findings for further analysis.
Every model evaluates every other
Features
Why LM Compass?
Built for researchers who need the best response for their data, not marketing benchmarks.
Multi-Model Comparison
Query 50+ LLMs simultaneously via OpenRouter. Compare responses side-by-side.
LLM-as-a-Judge
Automated cross-evaluation where models assess each other's responses.
Custom Rubrics
Define your own evaluation criteria for any use case or domain.
Consensus Rankings
Score-based grading with consensus-driven winner determination.
Human Feedback
Use human feedback or RL4F as one of your evaluation methods. When results are tied, we don't reinforce from any method — you choose.
Batch Experiments
Upload datasets for large-scale evaluations across models.
Built For
Who It's For
Researchers & Developers
Compare LLMs and SLMs with custom rubrics and automated evaluation to find the best response for your data.
AI Teams & Organizations
Determine best model responses at scale with batch experiments and exports.
Academic Community
Study model evaluation techniques with a research-backed, open-source platform.
Ready to find the best response for your data?
Support for OpenAI, Anthropic, Google, Meta, Mistral, and more via OpenRouter.
Get Started with LM CompassSign up to begin evaluating.