Langfuse v4 is live on Langfuse Cloud: a re-architecture of our data model.
It is up to 165× more performant in UI and on APIs.
It also enables new features such as full-text search, a new filter search bar, alerts, code evaluators, and the Langfuse Assistant.
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It requires you to make changes (e.g. instrumentation, SDKs, APIs, evals) in your projects by November 16, 2026.
From the email campaign: