Weights & Biases develops an AI developer platform for tracking and comparing machine learning experiments (W&B Models) and for tracing and evaluating LLM applications and agents (W&B Weave), and maintains the open-source wandb Python library. CoreWeave acquired it in May 2025, and its products are now offered within CoreWeave Forge.16310
Status: CoreWeave completed its acquisition of Weights & Biases on May 5, 2025. On September 30, 2026 CoreWeave launched CoreWeave Forge, which includes Weights & Biases Models; from that date W&B Free, Pro, and Enterprise SaaS accounts sign in through CoreWeave Forge, and wandb.ai pages are moving to coreweave.com in phases. Self-hosted and dedicated-instance deployments are unchanged, according to W&B and CoreWeave.12438
Using this organization’s offerings
The detailed audience, self-hosting, pricing, and restrictions review has not yet been completed. Consult the sourced product records below and the publisher’s current terms. Missing detail means unknown, not unavailable.
Key facts
What is and isn’t public
Products
No hosted model products are recorded for this organization.
Other products
| Product | Kind | Documented delivery and access | Reviewed |
|---|---|---|---|
| Weights & Biases Models (external site: coreweave.com) | Developer tool | Experiment tracking, hyperparameter search, evaluation tables, reports, and model and dataset versioning; offered in CoreWeave Forge Free, Pro, and Enterprise editions, with managed cloud, private cloud, on-premises, and hybrid deployment options.54 | Oct 1, 2026 |
| W&B Weave (external site: wandb.ai) | Developer tool | Tools for tracing, evaluating, and monitoring LLM applications and agents, including prompt management and cost tracking; documented alongside W&B Models in CoreWeave's Weights & Biases documentation.96 | Oct 1, 2026 |
Cataloged artifacts
Frameworks
- Weights & Biases Python SDK (wandb)SoftwareAvailability: Public
Organizational relationships
- Parent organization: CoreWeave (Subsidiary)
CoreWeave's Form 10-K for fiscal 2025 states that on May 5, 2025 CoreWeave acquired all of the outstanding equity interests of Weights and Biases, Inc. CoreWeave's Weights & Biases page says W&B now operates as part of CoreWeave and is a product within CoreWeave Forge.123
Units and subsidiaries have their own records and are counted separately from their parent.
Notable documented facts
- CoreWeave's Weights & Biases FAQ says W&B remains usable with other infrastructure providers, while some other CoreWeave Forge products, such as training, inference, and sandboxes, run on CoreWeave compute.3
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.
Open positions
8 recently confirmed positions in this catalog.
Last successful source check: Oct 2, 2026, 11:49 AM UTC
U.S. eligibility
Eligible · basis: Documented U.S. control
CoreWeave's Form 10-K for fiscal 2025 reports that on May 5, 2025 CoreWeave acquired all of the outstanding equity interests of Weights and Biases, Inc. CoreWeave, Inc. is a Delaware corporation with principal executive offices in Livingston, New Jersey, per the same filing's cover page. W&B's current Master Service Agreement (updated September 30, 2026) names Weights and Biases, LLC, a Delaware limited liability company with its principal place of business at 400 Alabama Street, San Francisco, California. The record keeps the W&B name because the entity, the brand, and the wandb repository continue under CoreWeave.1273
Sources
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