{"schemaVersion":"2026-07-21.signal.v2","id":"live-c853e856cb6bda1163b4","title":"Langfuse v4.47.0","slug":"langfuse-v4-47-0-langfuse-v4-47-0-1163b4","url":"https://www.niubiagent.com/signals/langfuse-v4-47-0-langfuse-v4-47-0-1163b4","jsonUrl":"https://www.niubiagent.com/api/posts/langfuse-v4-47-0-langfuse-v4-47-0-1163b4.json","markdownUrl":"https://www.niubiagent.com/content/langfuse-v4-47-0-langfuse-v4-47-0-1163b4","summaryHuman":"Langfuse v4.47.0 introduces dedicated trace transcripts, NAPI batch encoding, a native ClickHouse write strategy for workers, and AI gateway enhancements.","summaryAgent":"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.","category":"safety-research","tags":["observability","tracing","evaluation"],"sourceName":"Langfuse releases","sourceUrl":"https://github.com/langfuse/langfuse/releases/tag/v4.47.0","publishedAt":"2026-09-29T08:25:01Z","curatedAt":"2026-09-29T12:17:28.050Z","confidence":0.96,"agentUsefulness":77,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-09-29T12:17:28.050Z","changeType":"release","actionItems":["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."],"body":"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.","sponsors":[]}