Weights & Biases Python SDK (wandb)
Version 0.30.0
Maintained by Weights & Biases (a CoreWeave company)134
wandb is the open-source Python library and command-line tool for Weights & Biases. Training scripts and notebooks use it to record runs with their hyperparameters and metrics on a W&B server, where results can be viewed and compared; a Public API in the same SDK queries logged data afterward.246
- Repository: Repository (external site: github.com)
- Documentation: Python SDK reference (external site: docs.coreweave.com)
- License: LICENSE (external site: raw.githubusercontent.com)
- Release notes: Release v0.30.0 (external site: github.com)
Availability and license
Overall availability
Source code is public on GitHub under the MIT License, and the package installs from PyPI with pip install wandb. Logging results requires a W&B account and API key for a W&B server, which is a separate hosted or self-managed service.1342
Availability is separate from permission: read the license before using or redistributing.
Component reuse rights
- weights
- Unknown — no complete fact-level rights review
- code
- Reviewed qualifying license recorded — check scope and conditions
- data
- Unknown — no complete fact-level rights review
- documentation
- Unknown — no complete fact-level rights review
No complete system-rights review is recorded for this release.
Public materials checklist
| Item | Status | Notes and evidence |
|---|---|---|
| Source codeIs the source code publicly readable? | Public | Public GitHub repository wandb/wandb.1 |
| DocumentationIs user documentation published? | Public | The Python SDK reference (version 0.30.0) is published in CoreWeave's documentation; docs.wandb.ai now redirects there.6 |
| InstallationAre installation instructions or packages publicly available? | Public | Installable from PyPI with pip install wandb; the README describes creating an API key and optionally running wandb login before logging runs.42 |
| Supported platformsAre supported operating systems or hardware documented? | Public | PyPI lists Python 3.10 or later, with classifiers for Python 3.10 through 3.14.4 |
| Release statusAre versioned releases published? | Public | Versioned releases are published on GitHub and PyPI; version 0.30.0 was uploaded to PyPI on September 9, 2026. PyPI marks the package as production/stable.45 |
What it is useful for
Run and use notes
- The README documents three hosting options for the W&B server that the library logs to: multi-tenant cloud, dedicated cloud, and self-managed deployment on AWS, GCP, Azure, or on-premises infrastructure.2
Organization context
In the news
CoreWeave launches Forge, bringing Weights & Biases Models into one AI development platform
CoreWeave announced CoreWeave Forge on September 30, 2026, a development platform that brings training, inference, evaluation, and agent development into one environment. Forge includes Weights & Biases Models for tracking and comparing experiments. Weights & Biases, which CoreWeave acquired in 2025, says W&B software-as-a-service accounts now sign in through CoreWeave Forge and that self-hosted and dedicated deployments are unchanged. The open-source wandb client library remains available under the MIT License.
U.S. eligibility
Eligible · basis: U.S.-governed project
The wandb repository is maintained under the wandb GitHub organization by Weights & Biases; PyPI lists Weights & Biases as the package author, and the MIT license names Weights and Biases, Inc. as copyright holder. Weights & Biases' Master Service Agreement gives its principal place of business as San Francisco, California, and CoreWeave, a Delaware corporation headquartered in Livingston, New Jersey, acquired all of its equity in May 2025. The SDK reference is now published in CoreWeave's documentation.143786
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.