MasterClass is using W&B Weave to trace, monitor, and improve the AI agents that deliver personalized instruction to learners.

CoreWeave, Inc. (Nasdaq: CRWV), The Essential Cloud for AI™, today announced that MasterClass, the online personalized learning platform, selected CoreWeave Cloud to evaluate and improve the AI teaching agents that power its personalized instruction. MasterClass will use W&B Weave to evaluate how its AI teaching agents perform across conversations with learners, track their behavior, and use those insights to improve agents over time.

AI teaching agents are only as successful as how well they handle an entire conversation with a learner, not just a single question. Evaluating that behavior in production, and improving it continuously, requires both the compute to run agents at scale and the observability to see how they perform with real learners. As AI-native learning tools move from pilots into core product experiences, the ability to trace, monitor, and refine agent behavior in production is becoming as important as the infrastructure running it.

“W&B Weave gives us visibility into complete learner conversations, not just individual prompts, so we can see exactly where our AI teaching agents are succeeding and where they need to improve,” said Mandar Bapaye, chief product officer and chief technology officer at MasterClass. “That level of insight, combined with the performance we've seen from CoreWeave Cloud, gives us the confidence to scale.”

MasterClass's use of CoreWeave and W&B Weave spans evaluation and monitoring, allowing MasterClass to build a dedicated AI loop:

• Full-conversation tracing: W&B Weave captures complete learner interactions with AI teaching agents, giving MasterClass visibility into how agents perform across an entire conversation.
• Production monitoring and custom signals: MasterClass applies custom signals and monitors to live learner interactions to identify where teaching quality and personalization can improve.
• Unified system of record: W&B Weave gives MasterClass a single point of visibility across its evolving AI agent pipeline, from experimentation to production.

“CoreWeave gives MasterClass a single system of record and the observability their AI teaching agents need to continuously improve,” said Jon Jones, chief revenue officer at CoreWeave. “MasterClass is building on a platform designed to support that full lifecycle, from the compute that runs its agents to the visibility into how well they’re teaching and learning.”

MasterClass is extending this evaluation approach beyond its own engineering team. MasterClass Executive, the first business school experience for the AI era, built with the University of Chicago Booth School of Business and with collaboration from OpenAI, selects a cohort of roughly 700 members each year from a pool of about 30,000 applicants. The includes a hands-on AI lab that gives participants a practical framework for evaluating whether an AI system is ready for production, covering quality, cost, latency tradeoffs, and risk areas such as hallucinations, bias, and inadequate guardrails, using Weights & Biases evaluation and tracing tools.

CoreWeave consistently delivers industry-leading performance, demonstrated by record-breaking MLPerf benchmark results, its position as the only AI cloud to earn the top Platinum ranking in both SemiAnalysis ClusterMAX™ 1.0 and 2.0, and its #1 ranking for inference speed and price-performance for Moonshot AI’s Kimi K2.6 in independent inference benchmarking conducted by Artificial Analysis.

About CoreWeave

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to move at the pace of innovation, building and scaling AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave serves as a force multiplier by combining superior infrastructure performance with deep technical expertise to accelerate breakthroughs. Established in 2017, CoreWeave completed its public listing on Nasdaq (CRWV) in March 2025. Learn more at www.coreweave.com.

About MasterClass

MasterClass is the personalized learning platform that unlocks human potential with the world's best instructors. A membership provides unlimited access to 200+ instructors and classes in a variety of formats and subjects, including business and leadership, communication, health and wellness, writing and more, available anytime, anywhere, on mobile, tablet, desktop, Apple TV^®, Android^™TV, Amazon Fire TV and Roku^®. Learn negotiation from Chris Voss. Build a business with Mark Cuban. Cook with Gordon Ramsay. Write with Shonda Rhimes. Navigate relationships with Esther Perel. Make bold choices with Samuel L. Jackson.

Beyond its core membership, MasterClass offers advanced learning experiences built for the AI era. MasterClass Executive is an AI-native business education experience for working professionals who want to advance their careers, without pausing them or taking on debt. MasterClass On Call enables members to practice and prepare for high-stakes conversations through AI-powered roleplays and real-time coaching from the AI of the world's best, while MasterClass Certificates courses, developed with leading companies, equip learners with in-demand skills for fast-changing careers. For organizations, MasterClass at Work provides flexible training solutions that build essential skills across all levels of an enterprise.

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