What's new

Neptune release highlights.

June 4, 2025 web app

App version

3.4.12

Python logging client

0.14.0

• Added support for logging a series of histograms.
• When forking an experiment, you can log metric values before the fork point, as long as the points come after the last logged step of the parent run.
• In charts, you can normalize data by first value.

May 22, 2025 web app API

App version

3.4.11

Python logging client

0.13.0

• Added support for logging a series of files:
  • Use the log_files() function to upload files to Neptune.
  • To view logged files in the Neptune app, navigate to the Attributes tab of a selected run.
• Charts:
  • Point previews are enabled by default in chart widgets.
  • To make graphs easier to see, the min/max shadow isn't shown when manual smoothing is applied.
  • The chart legend can be resized horizontally and it's positioned further from the graph. You can restore sticking to the cursor in your user profile, under Experimental features.
  • Fixed an issue where disabling inherited metrics didn't hide metrics from ancestor runs within the experiment when viewing metrics of an experiment head in Runs mode.
• In newly created runs, the sys/diagnostics namespace tracks metadata statistics useful for diagnostics.
• In the runs table, updated the bulk actions toolbar for selected runs.
• Changed the namespace that collects console logs and other runtime metrics from system to runtime.

May 19, 2025 API

Python logging client

0.12.1

• Added option to set a timeout for Run.close() and neptune sync.
• New environment variable: NEPTUNE_MAX_CONCURRENT_FILE_UPLOADS.

April 29, 2025 web app API

App version

3.4.10

Python logging client

0.12.0

Python fetching client

0.15.0

• Added support for logging a series of strings:
  • The stderr and stdout streams are logged by default. You can disable this by setting enable_console_log_capture=False at Run initialization.
  • Use the log_string_series() function to log a custom sequence of text entries.
• Added support for logging files:
  • Use the assign_files() function to upload files to Neptune.
  • To view logged files in the Neptune app, navigate to the Attributes tab of a selected run.
  • You can download files from the Neptune app or with the download_files() function.
• You can use the side-by-side view in reports.
• Added support for the ! (NOT) operator to the extended regex syntax.
• The side-by-side view supports extended regex.
• Introduced causal SMA as the default smoothing algorithm.
• The sys/running_time_seconds attribute tracks the total running time of a Neptune run.

April 29, 2025 API

Python fetching client

0.15.0

• To specify exact experiments, runs, or attributes, you can pass a list of identifiers directly to the experiments, runs, or attributes argument.

April 8, 2025 API

Python logging client

0.11.3

• New environment variable: NEPTUNE_INVALID_VALUE_ACTION.

April 7, 2025 docs

• Added Self-hosted Neptune section.

April 3, 2025 web app

App version

3.4.9

• Added support for extended regex syntax in the Charts tab, runs table, and reports.
• Moved the query builder under the new button next to the search bar.
• Introduced global controls for displaying metric previews in charts.
• In reports, renamed runs and experiments are searchable by both the alias and original name.

April 1, 2025 API

Python fetching client

0.14.5

• New environment variable: NEPTUNE_HTTP_REQUEST_TIMEOUT_SECONDS.

March 25, 2025 API

Python logging client

0.11.1

• If you don't set a custom run ID at creation, Neptune generates one for you.
• Introduced Run methods for printing links to the web app: get_run_url() and get_experiment_url().
• Added support for protobuf versions 3.19.6+.
• Deprecated the NEPTUNE_DEBUG_MODE environment variable in favor of NEPTUNE_LOGGER_LEVEL.
• Performance and reliability improvements to local storage.

March 24, 2025 web app

App version

3.4.8

• Introduced an option to archive runs.
• For charts, local settings take precedence over the global settings.
• In reports, you can create aliases for runs and experiments.
• Clicking a data point on a scatter plot widget opens a new tab with all metadata of the related run.

March 18, 2025 API

Python logging client

0.11.0

• Logging is persistent: Data is stored locally on-disk instead of memory before being synchronized with the Neptune servers.

  • Use the NEPTUNE_LOG_FAILURE_ACTION environment variable to control what happens in case of logging issues.

• Introduced offline mode and a CLI tool for synchronizing locally stored data.

March 11, 2025 docs

• Added Fetcher API reference.

March 7, 2025 docs

• Added Log from different processes guide.

February 28, 2025 web app

App version

3.4.7

• The run description column is added to the table by default.
• In the runs table, the footer shows how many runs are selected and how many are hidden by filters.
• Runs are hidden from charts and compare views if filtered out with a query. To keep runs with the eye toggled on visible even if filtered out from the table, enable the option in the eye menu.
• Various improvements to charts stability and rendering.
• By default, charts apply one color per run and one line style per metric. In reports, you can now invert the styling in the chart settings.
• You can rename a report draft directly in the report title.
• From dashboards and reports, you can export charts in bulk.

February 25, 2025 API

Python logging client

0.10.2

• Stability fix: the main process isn't terminated in case of an error.

February 19, 2025 web app API

App version

3.4.6

Python logging client

0.10.0

Python fetching client

0.14.0

• Introduced metric previews:
  • Use the preview and preview_completion arguments to log metrics that aren't fully computed yet.
  • In chart widgets, display point previews and the completion level of the metric computation.
  • To include point previews when fetching metrics via the Fetcher Alpha API, use include_point_previews=True.

February 11, 2025 API

Python fetching client

0.13.0

• Alpha release of the next major Fetcher API version. The new API simplifies connecting to your Neptune project and specifying what metadata to fetch. For a tutorial, see Query metadata.

February 5, 2025 web app

App version

3.4.5

• Clarified wording around selecting visible runs.
• Charts:
  • Custom expressions support max() and min().
  • Improved rendering.
• Experiments:
  • Introduced dedicated URLs for experiments.
  • The most recently updated run within an experiment becomes the experiment head.
• Reports:
  • You can duplicate reports between projects and workspaces.
  • Run groups were renamed to run sets.

January 24, 2025 docs

• Added Neptune API error handling guide.

January 21, 2025 API

Python fetching client

0.12.0

• Use batching in ReadOnlyProject.fetch_read_only_experiments().

January 15, 2025 web app

App version

3.4.4

• Charts:
  • Unified color picker with HEX support.
  • Added visual indicator on the widget menu when local settings are applied.
  • Improvements to downloading charts as PNG.
• Expanded max length and allowed characters for project names.

January 13, 2025 API

Python fetching client

0.11.0

• Added eager_load_fields parameter for ReadOnlyRun, to control whether run attributes are loaded eagerly (default) or only when accessed.
• Expanded character set supported for project names.

January 9, 2025 docs

• Added guides for migrating your code from Weights and Biases or Neptune client 1.x.

January 7, 2025 API

Python logging client

0.9.0

• Removed support for Python 3.8.
• Fixed batching of metrics when logged with steps out of order.
• Fixed retry behavior on encountering a NeptuneRetryableError.

December 19, 2024 web app

App version

3.4.3

• Added the OR operator to compound search for charts.
• Improved the chart rendering and smoothing algorithm.
• Unified the single-run and multi-run dashboards.
• Introduced the Markdown widget and single value widget.