Langfuse v4.47.0
Langfuse v4.47.0 introduces dedicated trace transcripts, NAPI batch encoding, a native ClickHouse write strategy for workers, and AI gateway enhancements.
Why this signal matters
Langfuse release v4.47.0 brings several key observability, ingestion, and infrastructure updates: - Observability & Transcripts : Added the ability to render and measure dedicated trace transcripts, exposed current turn nesting level in transcripts, and labeled experiment query outcomes for SLO tracking. - Worker & Ingestion Performance : Introduced NAPI batch encoding for JS events and added a ClickHouse Native write strategy to workers alongside refactoring of the ClickHouse JSON write strategy. - AI Gateway Updates : Supports setting trace environments using the langfuse-environment header, captures full-mode inputs up to 5 MiB with omitted input markers, and ceases inferring usage for failed or cancelled generations. - Pricing & Ingestion Fixes : Adjusted pricing logic for Anthropic 1-hour cache writes and OpenAI cache-write tokens.
Actionable summary
Langfuse v4.47.0 adds trace transcripts rendering, NAPI-based JS event batch encoding, and a ClickHouse Native write strategy. AI Gateway updates include environment setting via langfuse-environment header, input capturing up to 5 MiB, and fixes to usage inference on failed generations.
- Agent usefulness
- 77/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Upgrade Langfuse instances to v4.47.0.
- If using the AI Gateway, optionally supply the langfuse-environment header to tag trace environments automatically.
- Evaluate worker configurations if intending to use the new ClickHouse Native write strategy.