Cerebras Systems vs. Nebius: Which Artificial Intelligence Stock Is a Better Buy Going into 2027?

Cerebras Systems (CBRS) and Nebius Group (NBIS) are two artificial intelligence-focused companies, each employing distinct approaches to capitalize on the rapidly expanding AI market. Cerebras Systems specializes in wafer-scale processors, aiming to deliver superior speed for AI inference and training via hardware sales and cloud services.

In contrast, Nebius Group provides a unified AI cloud platform for the entire lifecycle of data and model training, targeting various industries such as healthcare, financial services, and media.

Though both companies are experiencing rapid growth, Cerebras Systems reported a substantial net income of $237.8 million in its 2025 fiscal year, marking a 75.7% increase over the previous year. Conversely, Nebius Group's revenue surged to $529.8 million, a remarkable 479% increase compared to the prior year, resulting in a net income of $82.5 million.

However, Nebius Group's valuation appears more attractive, with lower Forward P/E and P/S ratios compared to Cerebras Systems. These metrics suggest that Nebius Group offers a potentially better entry point for investors seeking exposure to the AI sector.

Nonetheless, both companies face significant risks. Cerebras Systems must maintain innovation to stay ahead of established competitors with larger research budgets and must navigate the complexities of its wafer-scale architecture. Nebius Group must contend with capital-intensive data center investments and compete against industry giants with broader service offerings and deeper enterprise relationships.

Despite these challenges, my recommendation leans towards Cerebras Systems, given its unique wafer-scale chip technology and strategic partnerships such as the over $20 billion deal with OpenAI. However, careful consideration of the risks and valuation metrics should guide any investment decision.