# LangSmith Custom Apps is now generally available

LangChain says LangSmith Custom Apps can create interfaces from agent data with a prompt, including views for labeling runs, comparing experiments, and reviewing traces.

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Source: LangChain · Published 9/24/2026, 12:41:00

LangChain says [LangSmith Custom Apps](https://www.langchain.com/blog/langsmith-custom-apps) is now generally available. The feature creates interfaces from agent data with a prompt.

The interfaces include annotation queues for reviewing and labeling one or many runs at a time, experiment comparisons that place outputs and metrics side by side, and trace reviews built from trace or thread history to inspect app behavior.

Tags: LangSmith, LangChain, Custom apps, AI agents

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