Langfuse 4.71 expands AI gateway tracing
Updated Langfuse
Summary
Gateway generations gain more request and upstream-error facts; a separate v3 patch carries validation and secret-handling fixes.
- Tool
- Langfuse
- Category
- Agent infra
- Date
- Pricing
- Not stated in the sources we cited.
Langfuse released 4.71.0 and the separate v3 maintenance version 3.225.15 on October 27, 2026.
More useful gateway records
Version 4.71 records additional model, key-owner, byte and upstream-error facts on generations. Topics navigation gains an unassigned toggle, and normalized input/output handling improves support for nested messages and Pydantic agent history.
The notes also introduce a self-hosted government plan tied to a specific license-key type. That is not a claim that every new enterprise capability is covered by a free software license.
Older deployments have a separate patch
Version 3.225.15 backports project-invitation and annotation-queue validation fixes, plus legacy webhook-header protection and renewed secret requirements when destinations change. It is not the same feature release as v4.71.
Check your deployed major version and applicable license before choosing an upgrade path. No hosted price or measured reliability improvement is asserted here.
See the langfuse hub.
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Questions
What is Langfuse?
According to its site, Langfuse is an open source agent evals and observability platform to trace, evaluate and improve AI agents.
Is Langfuse open source?
The product site says all product features are MIT licensed, though the GitHub API reports no recognized license for the repository.
Does Langfuse support MCP?
The product site says SKILL.md, CLI and MCP connect coding agents to Langfuse.
Filed on Agent Radar. Claims in this note are limited to the sources above.