Langfuse 4.68.0 adds gateway keys and Topics views
Updated Langfuse
Summary
Langfuse v4.68.0, released October 22, 2026, adds AI gateway key controls, Topics views, managed skills and an MCP connections tool.
- Tool
- Langfuse
- Category
- Agent infra
- Date
- Open source
- Yes
- MCP
- Yes
- Pricing
- Not stated in the sources we cited.
Langfuse published v4.68.0 on October 22, 2026, according to the GitHub release. The release for the open source agent evals and observability platform adds AI gateway key management, new Topics result views, managed skills loading and a new MCP tool.
Release facts
| Fact | Detail |
|---|---|
| Product | Langfuse |
| Version | v4.68.0 |
| Release date | October 22, 2026 |
| License | Not stated in the cited release notes; the GitHub API reports no recognized license for the repository |
| Where to get it | GitHub release v4.68.0 |
What changed
- AI gateway keys. Members can create their own gateway API keys, and owners and admins can issue gateway keys as a service account. Keys are revoked when their user leaves the organization.
- Self-hosting gateway options. The release adds a global enable flag, a derived JWT public key and key ID for self-hosting, and an opt-in plain HTTP web URL for in-cluster traffic.
- Topics views. Results now offer Treemap and Grid views, and the Topics cluster map returns as a third view. A guided first run combines backfill with progress.
- Managed skills. The agent can load managed skills from Langfuse, and skills setup and usage filtering were streamlined.
- MCP. A new listLlmConnections tool was added to the MCP server. Another change upgrades the MCP SDK to 1.32.0.
- Data and ingestion. Blob export gets opt-in score metadata and provenance field groups. Projects that never update scores can skip score deduplication. Legacy ingestion is limited to scores for new organizations.
The release also lists dependency bumps and fixes to filter escaping, which I left out of the list above.
Questions
Does this release add anything for MCP users? The release notes list a new listLlmConnections tool under the MCP feature. They also list an MCP SDK upgrade to 1.32.0 and updated observation tool descriptions.
Who can create gateway API keys now? According to the release notes, members can create their own gateway API keys. Owners and admins can issue gateway keys as a service account.
Is this a breaking change for ingestion? The release notes say legacy ingestion is limited to scores for new organizations. They do not describe migration steps, so check the release page before upgrading.
For more, see the Langfuse tool hub, the Agent infra category, and the earlier Langfuse 4.64.0 launch.
Alternatives
| Tool | License | Pricing note |
|---|---|---|
LangfuseThis launchOpen source platform for tracing, evaluating and improving AI agents and LLM applications. | MIT | Not stated |
PhoenixPhoenix is an Arize-maintained AI observability and evaluation tool with prompt and dataset tooling. | — | Not stated |
OpikOpen-source platform for tracing, evaluating and optimizing LLM applications and agents. | Apache-2.0 | Not stated |
DeepEvalDeepEval is an Apache-2.0 open-source Python framework for evaluating LLM applications and agents. | Apache-2.0 | Not stated |
promptfoopromptfoo is an open-source CLI and library for evaluating and red-teaming LLM apps. | MIT | Not stated |
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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.