Key Notes
- Cerebras shares rose 6.3% to $177 in a Monday premarket snapshot after Sam Altman reaffirmed the company’s OpenAI partnership.
- Company disclosures value the multi-year OpenAI agreement for 750 megawatts of computing capacity at more than $20 billion.
- Citi maintained its 2026–2028 revenue outlook while emphasizing that stabilizing gross margins remains important for the stock.
Cerebras Systems Inc. (NASDAQ: CBRS) shares rose more than 6% in premarket trading on Monday after OpenAI Chief Executive Sam Altman reaffirmed the companies’ partnership, easing concerns about the chipmaker’s role in the AI developer’s computing plans.
The stock was up 6.3% at $177 in CNBC’s October 5 report. That snapshot followed a roughly 20% decline last week as investors reacted to reports that OpenAI was using Nvidia Corp. (NASDAQ: NVDA) GPUs for the latest Ultrafast version of GPT-6.1 Sol. The quoted move precedes the regular session and is not a closing return.
Altman reaffirmed the relationship in a Friday post on X, describing ongoing work on faster AI. His statement addressed speculation about the partnership but did not announce a new purchase agreement or disclose revised financial terms.
Cerebras is a close partner, and we have a deep engagement pushing on the frontiers of speed.
— Sam Altman (@sama) October 2, 2026
A Long-Term Deal Behind the Share Rebound
The underlying agreement extends beyond a single model launch. OpenAI’s January announcement set out plans to add 750 megawatts of low-latency computing capacity from Cerebras, with capacity coming online in phases through 2028.
OpenAI described Cerebras as part of a portfolio that matches different systems to different workloads. Its stated aim was to improve response times for tasks such as coding and AI agents by integrating specialized capacity into its inference stack, the infrastructure that runs models after they have been trained.
The contract’s financial scale is also larger than the original $10 billion figure cited in early reporting. In its June 23 earnings disclosure, Cerebras described the multi-year OpenAI deal for 750 megawatts as valued at more than $20 billion. That is a company disclosure about a multi-year arrangement, not revenue already recognized.
The financial relationship also extends to funding. Cerebras’s June disclosure listed a $1 billion working capital loan from OpenAI in January. That is a separate financing arrangement, rather than computing revenue, and should not be added to the company’s reported contract value.
This distinction helps explain the sensitivity of the shares to product-level news. A major customer can remain committed to long-term capacity while deploying a particular model on another supplier’s hardware. Altman’s reassurance supports the continued relationship, but does not establish which models will run on Cerebras, when each capacity tranche will be used or how much revenue will be recognized in a given quarter.
Nvidia Deployment Raises Questions About Execution
Monday’s advance recovers only part of the recent decline. CNBC put Cerebras’s market capitalization at just over $39 billion, compared with $95 billion during its May debut. Investors are therefore reassessing both the importance of the OpenAI relationship and the valuation attached to future growth.
Citi analysts kept their 2026–2028 revenue outlook unchanged, according to CNBC. They argued that a new model’s initial deployment was insufficient evidence to revise that view, while highlighting stabilization in gross margins as an increasingly important factor for the stock.
MarketSpeaker previously covered the company’s OpenAI agreement and the sharp market reaction it generated in August. The latest reversal illustrates how closely investors connect customer endorsements and deployment decisions with expectations for the supplier’s future sales.
Revenue Growth and Margins Tell Different Stories
Cerebras’s latest quarterly results provide a financial backdrop. For the three months ended June 30, the company reported GAAP revenue of $180.1 million, up 74% from a year earlier. Cloud and other services revenue reached $126 million, increasing 281%.
Its GAAP gross margin was 14.2%, compared with a non-GAAP core gross margin of 40.6%. Cerebras’s core measures exclude items including customer-warrant amortization, stock-based compensation and data center pass-through revenue and costs. The adjusted figure is useful for understanding management’s operating view, but it should not be presented as equivalent to the accounting result.
As of August, management forecast third-quarter core revenue of $214 million to $216 million and core gross margin of 38% to 40%. Those are non-GAAP forecasts for the quarter ended September, rather than reported results or guidance newly issued alongside Altman’s remarks.
The gap between strong sales growth and weaker accounting margins gives investors a more demanding test than a favorable social-media message. They need evidence that the company can serve rising demand while managing the expense of delivering computing capacity. A stock rebound alone does not demonstrate that those economics have improved.
Customer Demand Must Translate Into Profitable Capacity
The wider demand backdrop remains significant. MarketSpeaker recently covered OpenAI’s reported enterprise growth, which increases the importance of computing suppliers capable of supporting faster, larger-scale AI services.
For Cerebras, the immediate catalyst is Altman’s confirmation that the relationship continues. The longer-term assessment depends on deployed capacity, revenue recognition and margins. None of the statements reported on Monday establish a new contract award or remove the execution questions behind last week’s selloff.
