Changelog

Trigger Remote Custom Evaluations from the Langfuse UI

Enable non-technical users to trigger external experiment pipelines directly from the Langfuse UI on datasets.

Full-Text Search Across Prompt Content

Find prompts by searching through their actual content with our new full-text search capability

AWS SDK Default Credential Provider Chain Support

Self-hosted deployments can now use the AWS SDK default credential provider chain for Amazon Bedrock LLM connections.

Webhooks for Prompt Changes

Get real-time notifications for new prompt versions, changes to deployment labels or tags, and other edits.

n8n Node for Langfuse Prompt Management

Use Langfuse's prompt management capabilities directly in your n8n workflows to build powerful no-code agents.

Gemini 2.5 Pro, Flash, and Flash Lite support for playground, evaluations, and cost tracking

Langfuse says hello to Gemini 2.5 Pro (GA), Gemini 2.5 Flash (GA), and Gemini 2.5 Flash Lite (Preview). Support added for the LLM playground, evaluations, and cost tracking.

Message Placeholders in Chat Prompts

Inject context or message history into your chat prompts at just the right spot.

Pivot Tables in Custom Dashboards

Analyze multi-dimensional data with the new pivot table widget in Langfuse custom dashboards.

Search to Navigate Large Prompt Collections

Now it is easier to find prompts in prompt management via the new search bar

Histogram Charts in Custom Dashboards

Visualize data distributions with the new histogram chart type in Langfuse custom dashboards.

Agentic Onboarding & Docs MCP Server

Integrate Langfuse into your existing codebase using AI agents like Cursor, Claude Code, GitHub Copilot, and Windsurf. Powered by the new Langfuse Docs MCP server.

Improved JSON Handling in LangChain Prompts

Simplified JSON handling in prompts designated for LangChain consumption - no more extra escaping required.

Exports of Datasets and Audit Logs

Datasets and Audit Logs can now be exported as CSV and JSON directly from the UI.

CSV Download for Dashboard Charts

Download metrics from any chart in your custom dashboards as CSV files for further analysis and reporting.

Organize Your Prompts in Folders

Use slashes in prompt names to create folders for better organization.

OpenAI o3-pro and updated prices for o3 reflected in Langfuse cost tracking

Langfuse adds same day support for OpenAI's o3-pro model and updated o3 pricing

Python SDK v3 is now Generally Available

The OpenTelemetry-based Python SDK v3 is now stable and ready for production use.

Open Sourcing all Product Features

We have Open Sourced all Remaining Product Features under the MIT License

Pipecat Tracing Integration

Trace realtime audio agents built with Pipecat via OpenTelemetry and Langfuse

Launch Week 3 🚀

Langfuse Evaluator Library

Introducing the Langfuse Evaluator Library with prebuilt evaluators. Plus, enjoy a revamped UX with trace and variable previews for easier LLM evaluation.

Launch Week 3 🚀

OTEL-based Python SDK

The latest generation of the Langfuse Python SDK, built on the OpenTelemetry framework.

Claude Sonnet and Opus 4 support

Langfuse says hello to Anthropic Claude Sonnet 4 & Opus 4 with day 1 support for both the LLM playground, LLM-as-a-judge and cost tracking.

Launch Week 3 🚀

Terraform Modules for AWS, Azure and GCP

Deploy Langfuse on AWS, GCP, or Azure using our new Terraform modules.

Launch Week 3 🚀

Custom Dashboards

Create your own custom dashboards or use Langfuse-curated dashboards to analyze and understand your AI application deeply.

Launch Week 3 🚀

Save and share table views

Pin your favorite table settings and share them with a single link.

Launch Week 3 🚀

Full Text Search

Find content in inputs and outputs of your traces and observations with full text search.

Customize Product Module Visibility

Control which product modules are visible in the main menu through environment variables when self-hosting Langfuse

Metrics API for custom analytics

Build custom reports and dashboards with our flexible Metrics API. Query traces, observations, and scores with custom dimensions, metrics, and time granularity.

Dataset Run Level Scores

Score dataset runs to assess the overall quality of each run

Session Level Scores

Create and manage scores at the session level for more comprehensive evaluation of conversational AI applications

Copy Docs as Markdown

Easily copy the source markdown of documentation pages with a single click. Paste it into ChatGPT, Cursor, Windsurf and move way faster while using Langfuse.

OpenAI o3 and o4-mini integration for playground, evaluations and cost tracking

Langfuse launches same day full compatibility with OpenAI's latest models o3 and o4-mini

OpenAI 4.1 support for playground, evaluations and cost tracking

Langfuse now offers compatibility for OpenAI's new series of GPT models 4.1, 4.1-mini and 4.1-nano.

Admin APIs for Organization and Project Management

Langfuse now supports administrative actions via APIs across organizations and projects.

Protected prompt labels

Langfuse now supports protected prompt labels for better access control over your prompt deployment workflow

Playground support for Gemini 2.5 Pro Experimental

Langfuse says hello to Gemini 2.5 Pro Experimental. Support added for the LLM playground.

Tool Calling and Structured Output in Playground

Define and test tool calls and structured output schemas directly in the Langfuse Playground

Traces Table Peek View

Quickly navigate trace details in the table view via keyboard shortcuts or by clicking on the table rows.

New Prompt View

Our redesigned prompt view brings enhanced visualization, version comparison, and search capabilities.

New Trace View

Introducing our redesigned trace view with improved hierarchy visualization, timeline/tree toggle, and powerful search capabilities.

OpenAI Response API support in SDKs

Trace your OpenAI Response API calls with our Python and JS SDKs

Batch-export Scores via UI

Evaluation scores can now be exported in bulk directly from the Langfuse UI for easier analysis and reporting. Supports CSV and JSON formats.

Public API for Annotation Queues

Access and manage your annotation queues programmatically with our new Public API endpoints.

Prompt Composability

Create modular, reusable prompts by referencing existing prompts within other prompts.

Add support for Native Environments

Use native environment to separate staging, dev, and production systems within the same Langfuse project.

Add support for WorkOS Identity Provider

When self-hosting or on Langfuse Cloud Teams Plan, you can now use WorkOS as an Identity Provider (IdP).

Delete dataset items and runs

Dataset items and runs can now also be permanently deleted via the API and UI. Until now, these could only be archived.

Dataset items: Duplicate and add to many

You can now duplicate dataset items into other datasets and add them to many datasets at once when creating a new dataset item from a trace.

Langfuse Java Client

Langfuse offers a new Java API client for easy integration with your Java applications.

OpenAI GPT-4.5 support

Langfuse now offers full support for OpenAI's GPT-4.5, featuring day-one integration with our LLM playground, LLM-as-a-judge evaluation system, and comprehensive cost tracking capabilities.