{"schemaVersion":"2026-07-21.signal.v2","id":"live-517dfbe79d6e9ac5fc00","title":"Langfuse v4.45.2","slug":"langfuse-v4-45-2-langfuse-v4-45-2-c5fc00","url":"https://www.niubiagent.com/signals/langfuse-v4-45-2-langfuse-v4-45-2-c5fc00","jsonUrl":"https://www.niubiagent.com/api/posts/langfuse-v4-45-2-langfuse-v4-45-2-c5fc00.json","markdownUrl":"https://www.niubiagent.com/content/langfuse-v4-45-2-langfuse-v4-45-2-c5fc00","summaryHuman":"Langfuse v4.45.2 introduces project-level batching and transient failure retries for AI Gateway inference telemetry, along with OpenAPI typing fixes and web UI chart refactors.","summaryAgent":"Langfuse released v4.45.2 featuring per-project telemetry batching and retry logic for transient errors in the AI Gateway, alongside fixes for Object.prototype metadata key collisions, accurate batch-export S3 error reporting, OpenAPI type definitions for OtelSpan and dataset schemas, and database query optimizations for scores.","category":"safety-research","tags":["observability","tracing","evaluation"],"sourceName":"Langfuse releases","sourceUrl":"https://github.com/langfuse/langfuse/releases/tag/v4.45.2","publishedAt":"2026-09-24T19:16:32Z","curatedAt":"2026-09-25T00:17:26.480Z","confidence":0.96,"agentUsefulness":82,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-09-25T00:17:26.480Z","changeType":"release","actionItems":["Upgrade Langfuse server instances to v4.45.2.","Regenerate client SDKs if relying on OpenAPI types for OtelSpan scalars or dataset JSON-schema fields.","Verify AI Gateway configuration to ensure project-level batch telemetry and retry settings align with throughput requirements."],"body":"Langfuse v4.45.2 delivers a set of features, fixes, and refactors across backend and frontend components. Key updates include: - AI Gateway: Implements batch inference telemetry per project and adds retry mechanisms for transient failures ( 17855). - Bug Fixes: Retains metadata keys conflicting with Object.prototype ( 17686), replaces generic S3 errors with underlying read failures in batch export ( 17891), properly types OtelSpan scalars and dataset JSON-schema fields in OpenAPI ( 17892), resolves session metrics bar z-index issues ( 17887), and omits IdP-reported issuers from SSO discovery error outputs ( 17880). - Performance & Refactoring: Dedups score events rows path using GROUP BY + INNER JOIN ( 17883), raises index project trace observation granularity ( 17882), unifies cursor pagination metadata into a shared API envelope ( 17888), and replaces the recharts dependency with design-system charts in score analytics ( 17885, 17889).","sponsors":[]}