Cerebras Q1 Revenue Soars 94% but Margin Outlook Hits Stock

Cerebras Systems posted GAAP revenue of $193.4 million for Q1 2026, a 94% year-over-year increase, according to StockTitan. Cloud and services revenue, at $82.8 million GAAP, grew 178% year-over-year compared with roughly 59-60% growth on the hardware side, suggesting the inference-as-a-service portion of the business is scaling faster than hardware sales.

The revenue growth is happening against a backdrop of substantial deal flow. Cerebras has a previously announced multi-year agreement with OpenAI valued at more than $20 billion covering 750 megawatts of compute, and a multi-year partnership with AWS for fast inference global distribution. The company also reported that Kimi K2.6, described as the first trillion-parameter model on its platform, runs at roughly 1,000 tokens per second on Cerebras infrastructure.

The market's reaction to the print was sharp. Q2 2026 guidance called for core gross margin of 36-38%, down from 47% in Q1, and full-year core gross margin guidance landed at 38-41%. Shares fell 11.67% following the announcement. The revenue trajectory is strong, with full-year core revenue guided at $855-865 million, but the margin compression is what investors appear to be pricing in.

What the reporting does not provide is a breakdown of how much of Q1 revenue is attributable to the OpenAI deal specifically, which makes it difficult to assess how concentrated the revenue base is. Cerebras entered Q2 with $3.3 billion in cash as of March 31, 2026, after a $1 billion Series H in February 2026 and a $1 billion working capital loan from OpenAI in January 2026, with a further $850 million revolving credit facility secured in April 2026.

Whether Cerebras can hold margins while scaling to meet 750MW of compute commitments is the question the guidance raises without fully answering. For teams evaluating inference infrastructure, the throughput claims around trillion-parameter models are notable; the evolving cost structure is what to watch alongside them.