Langfuse v4.45.0
Langfuse v4.45.0 adds custom base URLs and extra headers for TypeSafe LLM connections, fixes confusion matrix lookups, and includes frontend design system migrations.
Why this signal matters
Langfuse v4.45.0 brings several features, fixes, and internal UI refactors: - LLM Connections: Added support for specifying a custom base URL and additional headers for TypeSafe connections ( 17866). - Web Bugfix: Switched to tuple keys for confusion matrix lookups to prevent delimiter collisions ( 17196). - Billing: Included organization name in ClickHouse Billing checkout events ( 17867). - Web UI Refactor: Migrated the exports settings table to the design system ( 17864), and added design-system implementations for StackedBarChart ( 17865) and AreaChart ( 17870). - Documentation: Documented Docker log retention for self-hosting setups ( 16363).
Actionable summary
Langfuse v4.45.0 introduces custom base URL and extra header support for TypeSafe connections, addresses delimiter collision bugs in web confusion matrix lookups using tuple keys, adds organization names to ClickHouse Billing checkouts, documents Docker log retention, and refactors UI components (exports table, StackedBarChart, AreaChart) into the design system.
- Agent usefulness
- 82/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Review the official Langfuse releases release notes before upgrading.
- Check compatibility, migration, and security notes against your current agent stack.
- Run focused regression tests before production rollout.