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NASDAQ Technology

Cerebras Tumbles 7% as OpenAI Reportedly Uses Nvidia for GPT6.1 Ultrafast Mode

Tom Rudovsky · Reported by Dow Jones Newswires
More coverage: Semiconductor Stocks · Technology
Sentiment info
Negative
Importance info
8
Price
$184.798
Mkt Cap
$41.367B
52W Low
$160.81
52W High
$386.34
52W Position info
15% above low
Off High info
52% below high
Rel. Volume info
0.7× avg
Market data snapshot near publication time

CBRS is trading near its 52-week low of $160.81 (15% above the low).

Summary

Cerebras shares fell 7% to $181.40 after SemiAnalysis reported that OpenAI is using Nvidia chips, not Cerebras hardware, to power the Ultrafast mode of its new GPT6.1 Sol model. This directly contradicts the August announcement that Cerebras would power Ultrafast mode, and OpenAI is Cerebras's largest customer by revenue backlog. The stock has already struggled since its May IPO at $350, and this adds another headwind to a company with high valuation and heavy dependence on a single customer. Watch for any official response from Cerebras or OpenAI, which could confirm or refute the report.

At the time of this announcement, CBRS was trading at $184.80 on NASDAQ in the Technology sector, with a market capitalization of approximately $41.4B. The 52-week trading range was $160.81 to $386.34. This news item was assessed with negative market sentiment and an importance score of 8 out of 10. Source: Dow Jones Newswires.


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CBRS - Latest Insights

CBRS
Sep 29, 2026, 4:25 PM EDT
Filing Type: 144
Importance Score:
8
Price at Filing: $195.81
Real-time Price: $181.92 info
Change: -$13.89 (-7%) info
Market Cap: $40.723B info
CBRS
Aug 25, 2026, 6:13 PM EDT
Filing Type: 4
Importance Score:
7
Price at Filing: $184.10
Real-time Price: $181.92 info
Change: -$2.18 (-1%) info
Market Cap: $40.723B info
CBRS
Aug 20, 2026, 5:00 PM EDT
Filing Type: 144
Importance Score:
8
Price at Filing: $209.70
Real-time Price: $181.92 info
Change: -$27.78 (-13%) info
Market Cap: $40.723B info
CBRS
Aug 18, 2026, 8:00 PM EDT
Source: GlobeNewswire
Importance Score:
8
Price at Filing: $217.10
Real-time Price: $181.92 info
Change: -$35.18 (-16%) info
Market Cap: $40.723B info
CBRS
Aug 18, 2026, 6:38 PM EDT
Filing Type: 4
Importance Score:
7
Price at Filing: $219.90
Real-time Price: $181.92 info
Change: -$37.98 (-17%) info
Market Cap: $40.723B info