# Langfuse v4.46.0

Category: safety-research
Published: 2026-09-25T14:20:07Z
Source: [Langfuse releases](https://github.com/langfuse/langfuse/releases/tag/v4.46.0)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-25T18:17:22.697Z
Tags: observability, tracing, evaluation

## Human Summary
Langfuse v4.46.0 introduces basic skill management, streamlined side-by-side experiment comparisons, a 100-row page size for tracing tables, and formatted JSON for dataset items, while removing the trace playback feature.

## Agent Summary
Langfuse v4.46.0 adds basic skill management, formatted JSON rendering for dataset items, and streamlined side-by-side comparisons in experiments. It deprecates/removes the web trace playback feature, routes v3 dataset-run-items reads to read replicas, and ensures the assistant honors data-retention settings.

## Body
Langfuse v4.46.0 brings several feature additions and UI updates. Key additions include basic skill management, streamlined side-by-side comparison for experiments, formatted JSON views for dataset items, and a 100-row page size option for tracing tables. On the backend and performance side, v3 dataset-run-items reads are now routed to a read replica, and the assistant now respects data-retention settings. Notably, the web trace playback feature has been removed, alongside various UI and billing webhook fixes.

## Recommended actions
- Note the removal of the trace playback feature if your team relies on web trace replay functionality.
- Verify compatibility with billing webhooks if consuming CHB string event-bus timestamps.
- Explore the new basic skill management feature and updated experiment comparison workflows.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.