CoreWeave stock rallies after announcing new AI tools for developers
Michael Intrator, co-founder and CEO of CoreWeave, participates in an interview at the New York Stock Exchange on September 22, 2025 in New York.
Michael Nagle | Bloomberg | Getty Images
CoreWeave Shares rose 8.7% on Wednesday as the AI cloud provider announced new tools to help programmers develop AI agents.
With the new serverless reinforcement learning service, you don’t have to worry about adding or removing computing power because it happens automatically.
Testing showed that when developers used CoreWeave’s new service, they were able to train models faster at 40% lower costs than running Nvidia H100 graphics processing units natively, with “no impact on model quality.” expression.
Reinforcement learning is a decades-old approach that involves developing systems through trial and error to improve results over time.
The launch comes five months after CoreWeave paid $1 billion to acquire Weights and Biases, a startup targeting developers with software to train and evaluate AI models. The deal is CoreWeave’s effort to complement its existing rental business Nvidia Graphics processing units to companies that need infrastructure to run models.
Companies are rushing to secure GPUs to implement AI projects. In the cloud, CoreWeave competes with leading providers such as: Amazon Web Services, although some companies will want to keep GPUs in their own data centers.
Demand is increasing.
Two weeks ago CoreWeave said OpenAI had agreed to extend a multi-year deal worth up to $6.5 billion, and last week the cloud company said: Meta It has committed to spending $14.2 billion.
Announced plans to acquire data center infrastructure provider in July Basic Scientificbought it from its long-time partner for $9 billion. Some Core Scientific shareholders more advantageous deal and we recommend that it be rejected in its current form. A revision to the purchase offer seems unlikely.
“We will literally, under no circumstances, revisit our offering,” said Mike Intrator, co-founder and CEO of CoreWeave. Bloomberg on Tuesday.
New Jersey-based CoreWeave went public on Nasdaq in March.
WRISTWATCH: Evercore ISI’s Daryanani says CoreWeave is an AI play at scale that accelerates revenue growth
