What's new and changed in Watson Machine Learning

Watson Machine Learning updates can include new features and fixes. Releases are listed in reverse chronological order so that the latest release is at the beginning of the topic.

You can see a list of the new features for the platform and all of the services at What's new in IBM Software Hub.

IBM Cloud Pak for Data Version 5.2.0

A new version of Watson Machine Learning was released in June 2025.

This release includes the following changes:

New features
This release of Watson Machine Learning includes the following features:
Deploy your machine learning assets with new software specifications that are based on runtime 25.1
You can now deploy machine learning assets by using the new software specifications that are based on the latest 25.1 runtime.

For more information, see Supported software specifications.

Deploy models that are trained with Spark 3.5
You can now deploy machine learning models that were trained with Spark 3.5.

For more information, see Supported software specifications.

Add the discontinued Spark 3.3 software specification back to the list of available software specifications.
It is possible to add the discontinued Spark 3.3 software specification back to the list of available software specifications.

For more information, see Supported software specifications.

Updates
The following updates were introduced in this release:
Removal of duplicate fields from JSON responses to deployment-related API calls

Up to and including release 5.1, the API calls for creating and managing deployments returned duplicate fields in entity and metadata object fields. Starting with release 5.2, the following fields will not be included in the entity object field:

  • name
  • space_id
  • project_id
  • tags
  • description

To avoid disruption, you must update your code that currently handles deployment-related API responses.

Customer-reported issues fixed in this release
For a list of customer-reported issues that were fixed in this release, see the Fix List for IBM Cloud Pak® for Data on the IBM Support website.
Deprecated features
The following features were deprecated in this release:
Removal of Federated Learning
The Federated Learning feature is not available anymore.