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- LangSmith Cloud
- LangSmith Fleet
Observability and evaluations
Engine
- Engine now shows only project-level spend in project view, so org-wide spend stays in the org settings surface.
- Engine now keeps the Slack issue-alert deck pinned above the scrolling issues list, so the callout stays visible as you browse. (Needs review: gated behind
langsmith_slack_app, confirm GA before publishing.)
Datasets and experiments
The experiments table now displays loading progress bars showing the number of runs completed and evaluated, and experiments that predate this feature show a placeholder progress bar.- Dashboards now support time series bar and line charts backed by the v2 chart API, so monitored metrics can use the newer chart type.
- Categorical feedback now shows derived percentages in experiment tables, so pass/fail metrics are easier to scan.
Prompts and playground
- Playground now mints OAuth bearers end to end for OAuth-enabled presets, so long-running batches and streams keep working.
Sandboxes
- Sandbox auth proxy now supports GCP auth flows, so sandbox workloads can reach Google APIs through the proxy.
Admin and billing
Administration
- Organization settings no longer expose the hidden LCU rate-card admin modal or tenantless routes, so rate-card management stays behind the scenes.
Fixes
- The Engine trial modal no longer shows the rough-math LCU bullet, so the pricing copy is less misleading.
Observability and evaluations
Automations
- Run rule webhook payloads now include a trace deep link for each run, so downstream systems can jump straight back to the trace.
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.
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.
Prompts and playground
- The Playground supports Amazon Bedrock API key authentication, letting you authenticate with a bearer token instead of AWS credentials.
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
Deployment
- You can now trigger a LangSmith Deployment from the Studio page.
- LangSmith Deployment now supports deploying Google Agent Development Kit (ADK) agents.
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.
Admin and billing
Administration
- Organization admins can now disable personal access token creation from the organization settings page.
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.
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.
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