Cerebras Systems (CBRS) shares posted sharp second-quarter growth as cloud demand lifted revenue and strengthened its 2026 outlook. However, CBRS stock plunged 13.93% after hours to $225.55 after closing the regular session at $262.06, representing an 11.63% gain. The reversal followed the earnings release and came despite stronger core revenue and raised annual guidance, a pattern not uncommon for high-growth semiconductor names that have rallied into earnings as investors lock in gains.

Cerebras, which builds wafer-scale AI processors designed to compete with NVIDIA's GPU-based systems for training and inference workloads, is positioning its Cloud business as a key differentiator. The company's architecture consolidates an entire neural network onto a single chip rather than distributing it across clusters of GPUs, reducing interconnect overhead.

Cerebras Q2 Revenue Doubles as Cloud Business Expands

Cerebras reported second-quarter GAAP revenue of $180.1 million, representing a 74% increase from the previous year. Meanwhile, core revenue reached $209.9 million, increasing 103% from the same period last year. Cloud and other services provided the strongest growth as demand for fast AI inference continued to expand rapidly, a segment that is increasingly central to the AI infrastructure market as enterprises shift from model training to deployment at scale.

GAAP cloud and services revenue reached a record $126 million, representing growth of 281% year over year. Core cloud and services revenue increased 287% to $127.7 million during the quarter. Consequently, cloud operations accounted for a significant share of Cerebras' quarterly growth and supported its broader infrastructure expansion strategy.

Core gross margin improved to 41%, rising approximately 940 basis points compared with the second quarter of 2025. Additionally, core operating margin improved by roughly 2,600 basis points but remained negative at 16%. GAAP gross margin stood at 14%, while the company's GAAP operating margin remained deeply negative at 265%.

Cerebras Expands AI Capacity and Strengthens Major Partnerships

Cerebras ended June with $25.4 billion in remaining performance obligations, providing substantial contracted business for future periods. The company also reported holding $8.6 billion in cash, restricted cash, equivalents, and short-term investments. Furthermore, Cerebras secured an $850 million revolving credit facility to support the development of additional data center capacity.

The company increased its contracted data center capacity to more than 600 megawatts, scheduled for delivery through the end of 2027. Its wider pipeline now includes several gigawatts of potential data center opportunities. Cerebras also expects its manufacturing capacity to increase more than tenfold during 2026 through the addition of new contract manufacturing lines.

Cerebras expanded its manufacturing partnerships with Flex, Sanmina, and Rocket EMS, while securing wafer supply from TSMC. Its wafer-scale architecture also reduces reliance on HBM memory, CoWoS packaging, and three-nanometer fabrication technology — components that have been persistent bottlenecks in the broader AI chip supply chain. As a result, the company expects to face fewer supply constraints as infrastructure deployments accelerate during 2027 and beyond.

Cerebras Raises 2026 Outlook as Cloud Demand Builds

Cerebras has strengthened its technology relationships with major industry players, including OpenAI, AMD, AWS, CrowdStrike, and several emerging AI software companies. Its infrastructure currently supports OpenAI GPT-5.6 Sol at speeds reaching 750 tokens per second. Additionally, Cerebras and AMD developed disaggregated inference systems designed to increase throughput by as much as five times.

The AMD-supported inference offering remains scheduled for production during the fourth quarter of 2026. Cerebras also expects to deliver similar throughput improvements through Amazon Bedrock during the first quarter of 2027. Meanwhile, Cognition and Lovable signed new cloud capacity agreements as Cerebras continued to expand its customer base.

For the third quarter, Cerebras expects core revenue between $214 million and $216 million. Management also forecasts core gross margins between 38% and 40%, with operating margins remaining negative. For the full year 2026, Cerebras raised its core revenue guidance to a range of $880 million to $890 million, alongside stronger margin expectations. The company's ability to convert its substantial backlog into recognized revenue, along with execution on its manufacturing scale-up and partner production milestones, will be closely watched as the competitive landscape in AI inference intensifies.