Langfuse traces LLM application execution end-to-end. Track prompts, completions, and costs. Evaluate output quality. Debug issues with detailed traces.
Tracing
Automatic instrumentation for common frameworks. Manual tracing for custom logic. Nested spans for complex workflows. Metadata for filtering and analysis.
- Instrument with SDK or integration
- Track costs and latency per trace
- Add metadata for filtering
- Set up evaluations for quality monitoring
- Create dashboards for key metrics
Analytics
Cost tracking across models and features. Latency analysis identifies bottlenecks. Quality scores from evaluations. Usage patterns inform optimization.