LangSmith Cloud changelog

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Observability and evaluations

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Automations

• Run rule webhook payloads now include a trace deep link for each run, so downstream systems can jump straight back to the trace.

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Engine

• Per-workspace Engine spend is now generally available: you can view LCU and USD spend directly on the Engine settings page, including session-level spend.
• The Engine settings page now surfaces additional Engine details in one place.
• You can rotate Engine issue-board webhook signing secrets from both the API and the webhook settings UI.
• The Engine issues list adds a sort option by trace count.

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Datasets and experiments

• A new out-of-the-box Assertions evaluator scores outputs against an explicit list of criteria specified in the reference output, and an Assertions rule is auto-attached when you add assertion-style examples to a dataset.
• Evaluator metrics are improved in the experiment detail, comparison, and global experiments tables.

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Prompts and playground

• The Playground supports Amazon Bedrock API key authentication, letting you authenticate with a bearer token instead of AWS credentials.

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Tracing

• The trace view now shows an unread indicator on a run’s actions menu when the run has reviewer notes you have not seen yet.
• The waterfall view is now full-height with sticky turn headers, so you keep your place while scrolling through long traces.
• Global search now includes context and sandboxes

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Deployment

• You can now trigger a LangSmith Deployment from the Studio page.
• LangSmith Deployment now supports deploying Google Agent Development Kit (ADK) agents.

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Sandboxes

• Sandbox proxy rules now support configuring AWS authentication, so sandboxes can reach AWS services through the proxy with signed requests.
• Sandboxes can create snapshots from a Dockerfile build source.

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Admin and billing

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Administration

• Organization admins can now disable personal access token creation from the organization settings page.

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Usage and billing

• Granular billable usage now supports filtering and grouping by retention tier, separating long-lived from short-lived traces.
• The Granular Billable Usage page now surfaces LangSmith Deployment usage, including nodes executed, agent runs, and agent uptime, alongside trace usage.

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Fixes

• Performance improvements for the loading of large traces.
• Filter values for metadata are now preserved when you reopen a filter dropdown to edit it.
• Dataset creation now uses a multi-select dropdown for choosing CSV fields.