30+
LLM Models Supported
50+
Built-in Benchmarks
100%
Open Source
Self
Hostable
Langmuse supports all major LLM providers out of the box.
GPT-4o
OpenAI
Claude 3.5 Sonnet
Anthropic
Gemini 1.5 Pro
Mistral Large
Mistral AI
LLaMA 3.1 405B
Meta
Command R+
Cohere
Grok 2
xAI
30+ More
All Providers
Stop guessing which model is best. Langmuse gives you data-driven answers.
Run head-to-head comparisons across GPT-4o, Claude 3.5, Gemini, Mistral, LLaMA, and 30+ other models on your own task types.
Benchmark models on the exact tasks your product needs, code generation, summarization, reasoning, retrieval, function calling, and more.
Visualize the price-to-performance tradeoff across every model. Find the optimal model that balances quality and API cost for your budget.
Define your own evaluation criteria, rubrics, and golden datasets. Run automated test suites and get reproducible scores you can trust.
Track how model performance evolves over time as providers update their models. Get alerted when your top-performing model drops in quality.
Fully open source on GitHub. Run Langmuse in your own infrastructure for complete data privacy and no vendor lock-in.