TLDR
- Rigetti Computing launched its most powerful quantum computer to date, the Cepheus-1-108Q, after a January delay.
- RGTI stock jumped 7.9% in premarket trading Wednesday following the announcement.
- The system is now available through Rigetti’s own cloud platform and Amazon Braket.
- Rigetti also delivered a 9-qubit Novera processor to the University of Saskatchewan.
- The company plans to push the Cepheus system to a median 99.5% two-qubit gate fidelity later this year.
Rigetti Computing (RGTI) was trading up 7.9% in premarket Wednesday at the time of writing, with the stock also up around 7.2% for peer IonQ (IONQ) and 10% for D-Wave Quantum (QBTS).
$RGTI $LAES $IONQ $QBTS | Rigetti launches the 108 qubit Cepheus-1-108Q on Amazon Braket.
Using a modular chiplet architecture, it hits 99.1% two qubit fidelity and elite 60ns gate speeds. Rigetti scales as the "Silicon Valley" of quantum classical AI infrastructure. https://t.co/j2gZK5JQIF pic.twitter.com/O1fc9VlfaV
— Ticker Wire (@Tickerwire) April 8, 2026
Rigetti has finally made its most powerful quantum computer generally available â and Wall Street took notice.
The Berkeley, California-based company announced that its Cepheus-1-108Q quantum system is now open to customers and partners. It’s the most advanced machine Rigetti has built to date, and its release clears up months of uncertainty around the company’s product roadmap.
Back in January, Rigetti said it needed more time before releasing Cepheus. The company pushed the timeline, targeting the end of the first quarter. It hit that mark.
The system runs on 108 qubits, and is accessible through Rigetti’s own quantum cloud platform, known as Rigetti QCS. It’s also available through Amazon Braket, the quantum computing service run by Amazon Web Services.
Still Work to Do
The launch doesn’t mean the product is finished. Rigetti has said it expects to improve the Cepheus system’s performance over the coming months, with a target of reaching a median 99.5% two-qubit gate fidelity. That metric is essentially a measure of how accurate and reliable the system’s operations are.
Two-qubit gate fidelity matters a lot in quantum computing. Higher fidelity means fewer errors, and fewer errors means more useful results. Rigetti hitting 99.5% would put it in increasingly competitive territory.
The company also separately delivered a 9-qubit Novera processor to the University of Saskatchewan. That move points to real-world demand for Rigetti hardware beyond just cloud access, and it’s being read by investors as a sign the company is gaining commercial traction.
Context and Broader Picture
The premarket bounce in RGTI wasn’t happening in a vacuum. Peer names IonQ and D-Wave Quantum also moved higher Wednesday, helped in part by a broader market rally tied to a two-week cease-fire agreement in Iran.
Still, the Cepheus news gave Rigetti something its competitors didn’t have on the day â a specific product catalyst.
Analyst sentiment across the quantum sector has been cautious lately, with several price target cuts in recent months. RGTI is down roughly 35.89% year-to-date, and carries a current market cap of around $4.72 billion.
The stock’s average daily trading volume sits near 29 million units, reflecting how actively it’s watched by retail and institutional traders alike.
Wednesday’s move suggests investors are choosing to focus on the product progress over the broader noise â at least for now. The Cepheus-1-108Q launch, delivered on the company’s revised timeline, gives Rigetti something concrete to point to.
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