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Changelog
Latest release updates from the Langfuse team. Check out our Roadmap to see what's next.
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December 12, 2025
December 12, 2025
OpenAI GPT-5.2 support
Langfuse now supports OpenAI GPT-5.2 with day 1 support across all major features.
December 11, 2025
December 11, 2025
Batch Add Observations to Datasets
Select multiple observations from the observations table and add them to a new or existing dataset with flexible field mapping.
December 2, 2025
December 2, 2025
Pricing Tiers for Accurate Model Cost Tracking
Langfuse now supports pricing tiers for models with context-dependent pricing, enabling accurate cost calculation for models with context-dependent pricing.
November 20, 2025
November 20, 2025
Hosted MCP Server for Langfuse Prompt Management
Langfuse now includes a native Model Context Protocol (MCP) server with write capabilities, enabling AI agents to fetch and update prompts directly.
November 14, 2025
November 14, 2025
OpenAI GPT-5.1 support
Langfuse now supports OpenAI GPT-5.1 with day 1 support for the LLM playground, LLM-as-a-judge evaluations, and comprehensive cost tracking.
November 8, 2025
Launch Week 4 🚀
November 8, 2025
Launch Week 4 🚀
Organize Your Datasets in Folders
Use slashes in dataset names to create folders for better organization.
November 8, 2025
Launch Week 4 🚀
November 8, 2025
Launch Week 4 🚀
JSON Schema Enforcement for Dataset Items
Define JSON schemas for your dataset inputs and expected outputs to ensure data quality and consistency across your test datasets.
November 7, 2025
Launch Week 4 🚀
November 7, 2025
Launch Week 4 🚀
Score Analytics with Multi-Score Comparison
Validate evaluation reliability and uncover insights with comprehensive score analysis. Compare different evaluation methods, track trends over time, and measure agreement between human annotators and LLM judges.
November 6, 2025
November 6, 2025
Annotation Support in Experiment Compare View
Add human annotations while reviewing experiment results side-by-side. Review experiment outputs, assign scores, and leave comments while viewing full experiment context.
November 6, 2025
Launch Week 4 🚀
November 6, 2025
Launch Week 4 🚀
Baseline Support in Experiment Compare View
Compare experiment runs side-by-side with baseline designation to systematically identify regressions and improvements
November 6, 2025
Launch Week 4 🚀
November 6, 2025
Launch Week 4 🚀
Filters in Compare View
Filter experiment results in the compare view to focus on specific subsets, such as items where evaluator scores dropped below a threshold
November 5, 2025
Launch Week 4 🚀
November 5, 2025
Launch Week 4 🚀
Langfuse for Agents
Trace agents with beautifully rendered tool calls and understand their performance through Agent Evals.
November 4, 2025
Launch Week 4 🚀
November 4, 2025
Launch Week 4 🚀
Amazon Bedrock AgentCore Integration
Trace AI agents built with Amazon Bedrock AgentCore via OpenTelemetry and Langfuse
November 4, 2025
Launch Week 4 🚀
November 4, 2025
Launch Week 4 🚀
@Mentions and Reactions in Comments
Tag teammates with @mentions to notify them instantly, and add emoji reactions to comments for quick acknowledgments.
November 4, 2025
Launch Week 4 🚀
November 4, 2025
Launch Week 4 🚀
IdP-Initiated SSO Support
Langfuse now supports IdP-initiated SSO, allowing users to start authentication directly from their identity provider (e.g., Okta, Azure AD, Keycloak, JumpCloud)
November 4, 2025
Launch Week 4 🚀
November 4, 2025
Launch Week 4 🚀
Mixpanel integration
We teamed up with Mixpanel to integrate LLM-related product metrics into your existing Mixpanel dashboards.
November 3, 2025
Launch Week 4 🚀
November 3, 2025
Launch Week 4 🚀
Advanced Filtering for Public Traces and Observations API
The traces endpoint in public API now supports complex JSON-based filtering.
November 3, 2025
Launch Week 4 🚀
November 3, 2025
Launch Week 4 🚀
Filter Sidebar for Tables
Quickly filter tables by column values in the filter sidebar with one click.
October 26, 2025
October 26, 2025
Langchain v1 Support
Langfuse SDKs now support Langchain v1 for both Python and JS/TS. The integration remains stable and backward compatible.
October 16, 2025
October 16, 2025
LLM-as-a-Judge Execution Tracing & Enhanced Observability
Every LLM-as-a-Judge evaluator execution now creates a trace, allowing you to inspect the exact prompts, responses, and token usage for each evaluation.
October 10, 2025
October 10, 2025
Spend Alerts
Monitor your organization's cloud spending and receive notifications when costs exceed predefined monetary thresholds.
September 30, 2025
September 30, 2025
Natural Language Filtering for Traces
Filter your traces using plain English queries. Powered by AWS Bedrock with zero data retention.
September 30, 2025
September 30, 2025
Structured Output Support for Prompt Experiments
Enforce JSON schema response formats in prompt experiments to ensure consistent, parseable outputs for evaluation and analysis.
September 29, 2025
September 29, 2025
Mutable Score Configs
Score configurations can now be updated after creation. Modify existing configs via API/SDK and UI while keeping all your data safe.
September 17, 2025
September 17, 2025
Experiment Runner SDK
New high-level SDK abstraction for running experiments on datasets with automatic tracing, concurrent execution, and flexible evaluation.
August 28, 2025
August 28, 2025
TypeScript SDK v4 (GA)
The new OpenTelemetry-based TypeScript SDK v4 is now generally available with improved DX, modular packages, and seamless integrations.
August 27, 2025
August 27, 2025
Additional Observation Types for More Meaningful Span Context
New observation types including Agent, Tool, Chain, Retriever, Evaluator, Embedding, and Guardrail provide semantic meaning to your traces.
August 26, 2025
August 26, 2025
New End-to-End Walkthrough Videos
We've released new comprehensive walkthrough videos covering observability, prompt management, and evaluation to help you get up to speed quickly with Langfuse.
August 25, 2025
August 25, 2025
Full-Text Search Across Dataset Items
Find dataset items by searching through their actual content with our new full-text search capability
August 14, 2025
August 14, 2025
Additional provider options in LLM calls in playground and evals
Set additional provider options in your LLM calls in playground and in llm-as-a-judge evaluations.
August 7, 2025
August 7, 2025
Docs now available as Markdown (.md) endpoints
Append .md to any docs URL to fetch the page as Markdown. Built at compile time for fast, reliable access.
August 7, 2025
August 7, 2025
OpenAI GPT-5 pricing now available in Langfuse
Day 1 support for OpenAI GPT-5 including tracking token counts and USD spend.
August 6, 2025
August 6, 2025
Annotation Queue Assignments
Assign users to annotation queues to make it easier for team members to focus on relevant tasks.
July 30, 2025
July 30, 2025
Slack Integration for Prompt Webhooks
Receive prompt change notifications directly in your Slack channels with our native integration.
July 28, 2025
July 28, 2025
LLM Playground with Side-by-Side Comparison
The LLM Playground now supports side-by-side prompt comparison with parallel LLM execution.
July 28, 2025
July 28, 2025
Sessions in Annotation Queues
Annotation Queues now support session-level annotation, making it easier to evaluate multi-turn interactions in your LLM applications.
July 25, 2025
July 25, 2025
LiveKit Agents Tracing Integration
Trace real-time voice AI agents and multimodal conversations built with LiveKit Agents via OpenTelemetry and Langfuse
July 24, 2025
July 24, 2025
Trigger Remote Custom Evaluations from the Langfuse UI
Enable non-technical users to trigger external experiment pipelines directly from the Langfuse UI on datasets.
July 22, 2025
July 22, 2025
Full-Text Search Across Prompt Content
Find prompts by searching through their actual content with our new full-text search capability
July 18, 2025
July 18, 2025
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.
July 11, 2025
July 11, 2025
Webhooks for Prompt Changes
Get real-time notifications for new prompt versions, changes to deployment labels or tags, and other edits.
July 6, 2025
July 6, 2025
n8n Node for Langfuse Prompt Management
Use Langfuse's prompt management capabilities directly in your n8n workflows to build powerful no-code agents.
July 3, 2025
July 3, 2025
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.
July 2, 2025
July 2, 2025
Message Placeholders in Chat Prompts
Inject context or message history into your chat prompts at just the right spot.
July 1, 2025
July 1, 2025
Pivot Tables in Custom Dashboards
Analyze multi-dimensional data with the new pivot table widget in Langfuse custom dashboards.
July 1, 2025
July 1, 2025
Search to Navigate Large Prompt Collections
Now it is easier to find prompts in prompt management via the new search bar
June 30, 2025
June 30, 2025
Histogram Charts in Custom Dashboards
Visualize data distributions with the new histogram chart type in Langfuse custom dashboards.
June 28, 2025
June 28, 2025
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.
June 27, 2025
June 27, 2025
Improved JSON Handling in LangChain Prompts
Simplified JSON handling in prompts designated for LangChain consumption - no more extra escaping required.
June 23, 2025
June 23, 2025
Exports of Datasets and Audit Logs
Datasets and Audit Logs can now be exported as CSV and JSON directly from the UI.
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