# Langfuse v4.49.0

Category: safety-research
Published: 2026-10-01T09:58:56Z
Source: [Langfuse releases](https://github.com/langfuse/langfuse/releases/tag/v4.49.0)
Agent usefulness: 72/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-02T00:17:54.089Z
Tags: observability, tracing, evaluation

## Human Summary
Langfuse v4.49.0 introduces tool filters to the sessions table, tracking for evaluator onboarding funnels, reduced legacy public API rate limits, and various UI and dependency improvements.

## Agent Summary
Langfuse release v4.49.0 adds session table filtering by tools, modifies org-level analytics/ingestion routes, reduces legacy public API rate limits, and updates dependencies including axios and dompurify.

## Body
Langfuse release v4.49.0 includes new features such as tool filters for the session table (PR 17884) and evaluator onboarding funnel tracking in PostHog (PR 18075). Multiple changes targeted organization-level analytics and ingestion views (PRs 18069, 18082, 18084, 18090, followed by chore PR 18101 removing org-level ingestion overview and analytics view). Key chores include reducing legacy public API rate limits (PR 17572) and upgrading dependencies like axios to 1.20.0 and dompurify to 3.4.16.

## Recommended actions
- Verify compatibility with legacy public API integrations due to reduced rate limits.
- Update Langfuse web instances to access new tool filters in the sessions table.

## 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.