Cerebras Doubles Revenue but Loses 10% as OpenAI Deal Masks Margin Collapse

Cerebras Systems just handed Wall Street its first look under the hood as a public company, and the view is genuinely complicated. Revenue nearly doubled. Losses narrowed sharply. A $20 billion OpenAI contract landed on the books. And the stock still fell 10% in after-hours trading. That tension captures everything investors need to understand about where this company stands right now.

The Numbers That Matter

Cerebras reported Q1 2026 GAAP revenue of $193.4 million, up 94% year-over-year, with a GAAP gross margin of 45% and a GAAP operating loss of $15.0 million. On the non-GAAP "core" basis the company uses internally, the picture is even cleaner:

• Core revenue of $191.3 million, up 92% year-over-year, with hardware growing 60% and cloud services growing 167%
• Core gross margin of 47%, and core net loss of just $2.5 million
• Revenue surpassed analyst estimates of around $181 million
• Net loss narrowed to $14 million from $23.9 million in the prior year period
• The company ended Q1 with $3.3 billion in cash, equivalents, restricted cash, and short-term investments

The distinction between GAAP and "core" revenue matters here. Cerebras strips out pass-through data center costs and non-cash amortization of customer warrants (equity issued to customers like OpenAI that reduces reported revenue) to arrive at its core figures. It is a legitimate accounting choice, but investors should know the gap exists.

The Deal That Dwarfs Everything Else

The multi-year, 750 megawatt deployment agreement with OpenAI is valued at more than $20 billion , roughly 23 times the midpoint of the company's full-year 2026 core revenue guidance of $855 to $865 million. To put that in perspective: Cerebras just reported its best quarter ever, and the OpenAI contract alone is worth more than 23 years of that revenue run rate.

Under the deal, OpenAI will deploy 750 megawatts of Cerebras' high-speed inference compute over the next several years. The two companies also co-launched Codex-Spark, a model designed for near-instant coding and optimized for interactive work where latency matters, delivering more than 1,000 tokens per second. GPT-5.3-Codex-Spark marks OpenAI's first production deployment on silicon outside its long-standing core stack with Nvidia.

The arrangement goes far beyond a standard vendor-customer relationship. OpenAI and Cerebras are co-designing future models for future Cerebras hardware , a tight feedback loop that gives Cerebras visibility into frontier model architectures before they ship and gives OpenAI inference systems optimized for its specific workloads.

The financial structure of the relationship is also unusual. A $621 million current loan from a customer, plus a $362 million non-current portion on the balance sheet, is OpenAI essentially pre-funding the capacity Cerebras will build to serve it. OpenAI also holds a warrant to purchase up to 33.4 million shares of Cerebras Class N common stock at an exercise price of essentially zero, vesting as Cerebras delivers committed capacity. At the IPO opening price, the fully vested warrant would be worth approximately $11.7 billion.