Analyst Targets
- UBS (Timothy Arcuri): Buy, $330 price target
- Mizuho Securities (Vijay Rakesh): Buy, $300 price target (maintained Oct. 5)
- Morgan Stanley (Joseph Moore): Buy, $279 price target
- Freedom Capital (Paul Meeks): Upgraded to Buy, $209 price target (Oct. 2)
- Consensus (11 analysts): Strong Buy, average target $291.64
What Happened
Cerebras Systems (CBRS) closed Friday at $166.43, its lowest price since the company’s May IPO. The stock opened at $350 on its first day of trading, but it did not close at $350 on opening day. On Monday it reversed sharply, gaining as much as 9% after OpenAI CEO Sam Altman posted on X to address what he called “speculation” about the two companies’ relationship. Altman wrote that Cerebras is a “close partner,” adding that the two have “deep engagement” pushing on the frontiers of speed.
That sentence moved a company with a market value in the tens of billions of dollars by several billion dollars in a matter of hours.
What Broke the Stock
The damage came from two directions hitting at once. Research firm SemiAnalysis posted that OpenAI’s newly announced GPT-6.1 Sol model’s upcoming Ultrafast tier is running on Nvidia GPUs rather than Cerebras hardware. Cerebras had publicly powered the Ultrafast tier for the prior GPT-5.6 Sol model; the suggestion that the successor tier may run elsewhere read as a competitive demotion. OpenAI is a major customer, so any signal that Nvidia is displacing Cerebras at the margin can carry outsized weight for the revenue outlook.
The second hit was structural: an IPO lock-up release added selling pressure. Cerebras disclosed that it expected up to about 171.1 million shares could be released from lock-up or market-standoff provisions during the lock-up period, subject to early-release provisions and other exceptions. The combined result was a 20% decline over five sessions.
The Contract That Still Exists
What the selloff appeared to conflate was a single model’s speed tier with the entire commercial relationship. The two are not the same thing. Cerebras has disclosed that, in December 2025, it entered into a master relationship agreement with OpenAI under which OpenAI committed to purchase 750 megawatts of AI inference compute capacity and related services, with deployment expected in tranches during 2026 through 2028. In its IPO filings, Cerebras described the deal as valued at more than $20 billion.
OpenAI also provided Cerebras a working capital loan of approximately $1.0 billion tied to the agreement. Cerebras has disclosed the loan bears stated interest at 6% per year and may be repaid in cash or, subject to the agreement’s terms, through non-cash credits such as service fees, compute capacity, hardware, other services, and certain pass-through charges. Cerebras has also disclosed that it issued OpenAI a warrant to purchase up to 33,445,026 shares of Class N common stock, with vesting tied to conditions under the relationship.
As of June 30, Cerebras reported $25.4 billion in remaining performance obligations, with a significant amount attributable to its obligations under the OpenAI master relationship agreement. A single workload assignment for one model’s speed tier does not, by itself, unwind a multiyear infrastructure commitment.
Freedom Capital upgraded CBRS to Buy on Oct. 2.
Bull / Base / Bear
Bull: The 750MW deployment ramps on schedule, Cerebras recaptures high-speed inference workloads on GPT-6.x or GPT-7-class models, and Morgan Stanley’s $8 billion 2028 revenue target becomes achievable. UBS’s $330 target implies close to a double from current levels.
Base: Cerebras holds the inference infrastructure contract while Nvidia takes isolated model tiers where batch-size economics favor GPUs. Revenue grows into the $880-$890 million full-year guidance range management set after Q2. The stock rebuilds toward the $200-$215 zone from which it fell.
Bear: OpenAI systematically replaces Cerebras hardware as GPT model generations advance, the $20 billion deal is restructured or delayed, and continued lock-up-related selling pressure drives the stock back toward its recent lows. Customer concentration in a single counterparty is the existential risk here.
Technical Overlay
CBRS closed Friday at $166.43, with the daily RSI at 35.79 and the hourly RSI slipping into oversold territory below 30. Monday’s bounce carried the stock toward the $181-$185 zone, which now acts as the first meaningful resistance. Above that, the $194-$200 area, from which the stock fell last week, is the next test. A reclaim of $185 is the minimum condition to argue the chart has stabilized. Below $162-$163, the IPO-period floor is gone.
Bottom Line
Monday’s 9% gain was Altman reassuring the market that an online post didn’t kill a multiyear deal. He may be right. But the real question is not whether Cerebras still has a contract with OpenAI; it is whether Cerebras hardware stays in the critical path as OpenAI scales its most demanding model tiers, or whether Nvidia continues absorbing those workloads generation by generation. Cerebras has not yet formally announced a Q3 earnings date for the quarter ended September 30, 2026 in its SEC filings; that date will be the next concrete data point. Watch how much OpenAI-related revenue Cerebras recognized and whether management changes guidance language around the 750MW deployment pace.
