Fine-Tuning

Langfuse is open-source and data tracked with Langfuse is open. You can easily trace your application, collect user feedback, and then use the data to fine-tune a model for your specific use case.

Export Data for Fine-Tuning

To export generations and training data for fine-tuning, see the comprehensive Export Data guide which includes:

• Export generations in OpenAI JSONL format for fine-tuning
• Filter by quality scores to export high-performing examples
• Multiple export formats (CSV, JSON, JSONL)
• Programmatic access via SDKs and APIs

SDKs/API

All data collected in Langfuse is also available programmatically via the API and SDKs (Python, JS/TS). Refer to the API reference and Export Data for more information.