Release 0.85.0

September 23, 2026

Tip: These notes are also available at https://docs.wandb.ai/release-notes/server-releases#v0-85-0.

W&B Server 0.85 expands BYOB storage options with AWS-to-AWS S3 role assumption and a configurable IP address range for Azure Blob Storage signed URLs. In Weave, calls and agent spans now link to each other in both directions. Also in this release: collapsed workspace sections keep their controls within reach, you can choose how line plots display single-point metrics, and query panels have a new parallelism budget that lets deployments trade some request concurrency for lower peak memory.

Support and end of life

• W&B Server v0.73 has reached end of life.

Features

• Added support for AWS-to-AWS S3 role assumption for BYOB storage. Instead of granting a W&B AWS identity direct access to your bucket and KMS key, you can let a specific W&B workload temporarily assume a role that you own, which then accesses the bucket and key.

• For BYOB storage in Azure Blob Storage, you can now restrict the IP address range that can use signed URLs by setting the GORILLA_AZURE_PRESIGNED_URL_IP_RANGE environment variable. Azure Blob Storage enforces this restriction when a client accesses a blob. It is independent of any IP allowlist for the W&B application and API.

• A collapsed workspace section now keeps its settings, overflow menu, and pin control visible, so you can use them without expanding the section.

• Choose whether line plots display single-point metrics as scatter plots or bar charts. Set Single-point metrics to Scatter or Bar chart in the Data settings tab of a workspace, section, or panel. By default, automated workspaces show bar charts and manual workspaces show scatter plots. In scatter plots, larger markers make single data points easier to find and inspect.

  

• Line mode for full-fidelity line plots is now available for grouped line plots. To use it, set Full fidelity display to Line on the panel itself. A grouped panel that inherits a Line setting from its section or workspace continues to display in Band mode.

• To reduce peak memory usage when processing large, text-heavy wandb.Table files, you can now configure the process-wide parallelism budget for mapped operations, at the cost of some request concurrency. Set the QUERY_ENGINE_PARALLELISM_BUDGET environment variable to 1, 2, 4, 8, or 16. Lower values reduce concurrent conversion work and can help avoid out-of-memory errors in Weave workloads that load many large table files at once. The default is 16, so behavior is unchanged unless you set the variable.

Sweeps

• The Sweep.priorRuns field in the GraphQL API now supports pagination options, for more scalable access to previous runs.
• Requests to the sweep provider now retry automatically, so sweeps recover more gracefully from transient network failures.

Weave

• A Weave call now links to the agent spans it produced, and an agent span now links to the Weave calls it invoked.
• When you create a custom signal, you now define only its tags, and W&B composes the rest of the judge prompt for you.
  This prevents accidental changes to required scoring instructions. Editing existing signals is unchanged.

Performance improvements

• Ungrouped line plots now render the newest lines first and fill in lines incrementally. This speeds up loading a works
  pace or report and reduces load on your deployment.
• Highlighting a line in a line plot no longer rebuilds the underlying plot, and hidden tooltip copies are no longer ren
  dered.

Fixes

• Fixed bugs that could cause tooltips, including bounding-box tooltips, or axis labels to appear outside the chart area
  , be obstructed, or cover plotted data.
• Fixed a bug where X-axis labels on line plots and scatter plots did not update immediately or accurately.
• The smoothing slider now resets when you change the smoothing type, to prevent stale settings and produce more predict
  able results.