Rigetti Announces General Availability of 108-Qubit System

Rhea-AI Summary

Rigetti (Nasdaq: RGTI) announced general availability of its 108-qubit system, Cepheus-1-108Q, delivered via Rigetti Quantum Cloud Services and Amazon Braket on April 7, 2026. The modular chiplet system comprises twelve 9-qubit chiplets, achieves a 99.1% median two-qubit gate fidelity and ~60 ns gate speed, with 99.9% median single-qubit fidelity. Rigetti expects fidelity to improve through 2026 and targets a 99.5% median two-qubit fidelity later this year. The system validates Rigetti's chiplet-based scaling and aims to support deeper circuits for materials science, optimization, and quantum simulation.

Positive

• Qubit count increased from 36 to 108 (threefold)
• 99.1% median two-qubit gate fidelity on deployed system
• 99.9% median single-qubit fidelity reported
• Modular chiplet-based architecture (12×9-qubit chiplets)
• Available on Rigetti QCS and Amazon Braket

Negative

• Primary performance limitation shifted to coherence time
• Current median two-qubit fidelity 99.1%, below company target 99.5%

News Market Reaction – RGTIW

+6.52%

1 alert

+6.52% News Effect

On the day this news was published, RGTIW gained 6.52%, reflecting a notable positive market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

System size: 108 qubits Chiplets: 12 interconnected 9‑qubit chiplets Two‑qubit gate fidelity: 99.1% +5 more

8 metrics

System size 108 qubits Cepheus‑1‑108Q qubit count

Chiplets 12 interconnected 9‑qubit chiplets Modular architecture of Cepheus‑1‑108Q

Two‑qubit gate fidelity 99.1% Median two‑qubit gate fidelity on Cepheus‑1‑108Q

Two‑qubit gate speed ~60 ns Gate speed on Cepheus‑1‑108Q

Single‑qubit fidelity 99.9% Median single‑gate fidelity on Cepheus‑1‑108Q

Prototype two‑qubit fidelity 99.9% at 28 ns Prototype system using adiabatic CZ gate scheme

Relative gate speed 1,000–10,000x faster Gate speeds vs trapped‑ion and neutral‑atom systems

Fidelity roadmap target 99.5% two‑qubit median Expected Cepheus‑1‑108Q median two‑qubit fidelity later this year

Market Reality Check

Price: $7.40 Vol: Volume 111,406 vs 20-day ...

normal vol

$7.40 Last Close

Volume Volume 111,406 vs 20-day avg 101,214 (relative volume 1.1x). normal

Technical Trading below 200-day MA: price $5.60 vs 200-day MA $12.16, far under prior trend.

Peers on Argus

RGTIW was up 0.9% while key peers were mixed: AGMH -3.09%, KTCC -2.33%, SCKT +9....

1 Down

RGTIW was up 0.9% while key peers were mixed: AGMH -3.09%, KTCC -2.33%, SCKT +9.72%, ZSPC -19.46%, TACT -2.11%. Only ZSPC appeared on momentum scans, moving -4.37%. Moves do not show a coordinated sector trend, suggesting stock-specific catalysts.

Historical Context

5 past events · Latest: Mar 31 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Mar 31	Product sale	Positive	-4.0%	Sale of a 9‑qubit Novera QPU to the University of Saskatchewan.
Mar 25	Investment plan	Positive	-8.1%	Plan to invest up to $100M in UK and target 1,000+ qubits.
Mar 04	Earnings results	Neutral	-8.6%	Reported Q4 and 2025 results, losses, cash balance, and key system orders.
Feb 18	Earnings date	Neutral	+2.8%	Announced timing and access details for Q4 and full‑year 2025 results call.
Jan 20	System order	Positive	-4.0%	Received $8.4M purchase order for a 108‑qubit system from India’s C‑DAC.

Pattern Detected

Recent positive commercial and strategic announcements (108‑qubit order, UK investment, Novera sale) were followed by negative 24h moves, indicating a tendency for the stock to sell off on good news.

Recent Company History

Over the last few months, Rigetti reported several milestones: an $8.4M order for a 108‑qubit system on Jan 20 (24h move -4.01%), Q4 and full‑year 2025 results on Mar 4 (move -8.58%), a planned up to $100M UK investment on Mar 25 (move -8.11%), and a Novera QPU sale on Mar 31 (move -4.01%). Today’s 108‑qubit cloud availability builds directly on the earlier 108‑qubit order and fidelity milestones.

Market Pulse Summary

The stock moved +6.5% in the session following this news. A strong positive reaction aligns with the...

Analysis

The stock moved +6.5% in the session following this news. A strong positive reaction aligns with the company’s push toward larger, higher‑fidelity systems, but contrasts with prior selling on good news, where three recent positive updates saw 24h moves of -4.01%, -8.11%, and -4.01%. Investors would have weighed that pattern against a depressed price 88.03% below the 52‑week high and the long, multi‑year roadmap to quantum advantage.

Key Terms

qubit, gate fidelity, quantum error correction, fault-tolerant, +3 more

7 terms

qubit technical

"announced the general availability of its 108-qubit quantum computing system"

A qubit is the basic unit of information used in quantum computers, like a coin that can be heads, tails or both at once until you look; this lets quantum machines process many possibilities simultaneously. For investors, qubits matter because their number, quality and stability determine how powerful a quantum computer can be, affecting which companies might gain an edge in fields such as cryptography, drug discovery, materials design or complex financial modeling.

gate fidelity technical

"performing at a 99.1% median two-qubit gate fidelity with a gate speed"

Gate fidelity measures how closely a quantum logic operation (a 'gate') performs compared with its ideal, error-free action. For investors, it is a practical indicator of a quantum device’s reliability: higher fidelity means individual operations are more accurate, which lowers error rates, reduces the need for costly error correction, and speeds the path to useful, scalable quantum computing — much like a precision tool producing consistent, predictable results.

quantum error correction technical

"necessary for quantum error correction and future fault-tolerant architectures"

Quantum error correction is a set of methods for detecting and fixing mistakes in quantum computers by encoding fragile quantum information across multiple physical parts, much like using multiple copies or checksums to protect a sensitive digital file. For investors, it matters because reliable error correction is a key technical milestone that determines whether quantum machines can scale from experimental devices to practical tools that could disrupt computing, encryption, drug discovery and other industries.

fault-tolerant technical

"will ultimately enable fault-tolerant quantum computing."

A fault-tolerant system is built so it keeps working correctly even when parts fail, by automatically detecting problems and shifting tasks to backups or safe modes. Think of it like a car with redundant brakes or a delivery route that has alternate roads: the service keeps running despite breakdowns. For investors, fault tolerance reduces unexpected downtime, cuts potential loss or regulatory risk, and helps preserve revenue and reputation over time.

adiabatic technical

"using a proprietary implementation of an adiabatic CZ gate scheme."

An adiabatic process is one that happens without exchanging heat with the surroundings — like an ideal insulated thermos where the temperature changes but no heat gets in or out. Investors care because this concept underlies how certain technologies and manufacturing steps manage temperature and energy: it affects product efficiency, reliability, cooling needs, regulatory safety limits, and therefore costs and competitive advantage for companies making medical devices, electronics, or cryogenic systems.

signal-to-noise ratio technical

"control system delivers superior signal-to-noise ratio for qubit readout."

The signal-to-noise ratio measures how much useful information (the signal) stands out from irrelevant or random data (the noise). For investors, a high ratio means price moves, earnings reports or research reliably reflect real value or trends, while a low ratio means it's harder to separate meaningful signals from meaningless fluctuations—like trying to hear a single voice in a crowded room or tune a radio to a clear station, which affects confidence in decisions.

coherence time technical

"shifted the primary performance limitation from coupler behavior to coherence time"

Coherence time is the period during which a system's signals or data remain consistently related or predictable. In investing, it helps indicate how long information or trends stay relevant before changing, much like how the weather forecast remains accurate only for a certain number of days. Longer coherence times suggest more stable conditions, while shorter ones imply quicker shifts and less predictability.

AI-generated analysis. Not financial advice.

Cepheus-1-108Q validates Rigetti’s proprietary chiplet-based scaling architecture and is now generally available to Rigetti’s customers and partners via the Rigetti Quantum Cloud Services platform and through Amazon Braket, the quantum computing service by AWS.

BERKELEY, Calif., April 07, 2026 (GLOBE NEWSWIRE) -- Rigetti Computing, Inc. (Nasdaq: RGTI) (“Rigetti” or the “Company”), a pioneer in full-stack quantum-classical computing, today announced the general availability of its 108-qubit quantum computing system, Cepheus™-1-108Q, now accessible to customers and partners via the Rigetti Quantum Cloud Services (QCS^®) Platform and through Amazon Braket, the quantum computing service by AWS.

Cepheus-1-108Q is Rigetti’s highest qubit-count system to date and the industry’s largest modular quantum computing system, based on Rigetti’s proprietary chiplet-based architecture. The system comprises twelve interconnected 9-qubit chiplets, tripling the number of qubits and chiplets from Rigetti’s previous 36-qubit system, Cepheus-1-36Q.

The system is currently performing at a 99.1% median two-qubit gate fidelity with a gate speed of ~60 ns and a 99.9% median single-gate fidelity. Rigetti is releasing Cepheus-1-108Q now in response to growing customer interest, and will continue to improve the system performance throughout 2026 as the Company advances on its roadmap.

“Cepheus-1-108Q is a milestone that validates our ambitious approach to scaling quantum computers,” said Dr. Subodh Kulkarni, Rigetti CEO. “Our proprietary chiplet-based architecture is paving the way toward higher fidelity, higher qubit systems that will ultimately enable fault-tolerant quantum computing.”

“We are proud of the progress we have made in delivering a system at this scale. The innovations we’ve developed while designing this system give us confidence in our vision and approach to building the next generation of quantum computers. We will continue to improve fidelity as we scale to higher qubit counts and deploy new systems as we reach important performance milestones while maintaining gate speeds that are roughly 1,000-10,000 times faster than other modalities such as trapped-ion and neutral-atom systems.”

“The addition of Cepheus-1-108Q to Amazon Braket gives our global customers another choice as they research quantum computing applications in materials science, optimization, and quantum simulation. As the first gate-based device on Braket with over 100 qubits, Cepheus-1-108Q delivers improved fidelities that allow customers to push to wider and deeper circuits,” said Eric Kessler, General Manager, Amazon Braket. “Rigetti was a launch partner for Amazon Braket, and we're excited to deepen that relationship with this launch. With Cepheus-1-108Q, we bring the third generation of Rigetti devices to our customers, following Aspen and Ankaa. We remain committed to providing researchers and enterprises around the world with access to the latest quantum hardware.”

Key Technical Advancements
The new system features several significant engineering improvements designed to maintain fidelity and performance as qubit counts grow:

• Enhanced qubit and coupler design: Optimized chip design enables fast two-qubit gates and higher fidelity.
• CZ gates for error correction: Supports high-fidelity native gates and efficient circuit compilation necessary for quantum error correction and future fault-tolerant architectures. Rigetti achieved a two-qubit gate fidelity as high as 99.9% at 28 nanoseconds on a prototype system using a proprietary implementation of an adiabatic CZ gate scheme. These gates are already in use on Cepheus-1-108Q and will continue to improve as Rigetti incorporates those prototype learnings into larger systems.
• Upgraded control electronics: A newly engineered control system delivers superior signal-to-noise ratio for qubit readout.
• Advanced fabrication process: Rigetti’s Alternating-Bias Assisted Annealing technique improves qubit frequency targeting and reduces defects, contributing to higher fidelities.

During system development, Rigetti refined its architecture to mitigate coupling interactions between tunable couplers that become more pronounced beyond 100 qubits. These design improvements shifted the primary performance limitation from coupler behavior to coherence time, a key factor the Company continues to address through innovations in materials and fabrication.

Roadmap
Rigetti plans to continue to improve the fidelity of its individual chiplets and expects Cepheus‑1‑108Q to reach a median 99.5% two‑qubit gate fidelity later this year. Rigetti intends to update its technology roadmap later this year, once it has incorporated the results of this work, including how the Company plans to reach quantum advantage in about three years.

For more information on Amazon Braket, please visit https://aws.amazon.com/braket/.

About Rigetti
Rigetti is a pioneer in full-stack quantum computing. Rigetti quantum computers are based on superconducting qubits, which are widely believed to be the leading qubit modality given their maturity, clear path to scaling, and fast gate speeds. Current Rigetti quantum computing systems achieve gate speeds of 50-70ns, which is about 1,000 times faster than other modalities such as ion traps and neutral atoms.

The Company operates quantum computers over the cloud through its Rigetti Quantum Cloud Services (QCS) platform, enabling global enterprise, government, and research clients to pursue R&D. The Company’s proprietary quantum-classical infrastructure provides high-performance integration with public and private clouds for practical quantum computing.

Rigetti sells on-premises 9-108 qubit quantum computing systems, supporting national laboratories and quantum computing centers. Rigetti’s 9-qubit Novera QPU supports a broader R&D community with a high-performance, on-premises QPU designed to plug into a customer’s existing cryogenic and control systems.

Rigetti developed the industry’s first multi-chip quantum processor for scalable quantum computing systems. Leveraging this proprietary technology, Rigetti deployed the industry’s largest multi-chip quantum computer in 2025 with Cepheus-1-36Q, based on four 9-qubit chiplets tiled together. The Company designs and manufactures its chips in-house at Fab-1, the industry’s first dedicated and integrated quantum device manufacturing facility. Learn more at https://www.rigetti.com/.

Rigetti Computing Media Contact:
press@rigetti.com

Amazon Braket Media Contact:
Mayar Abdelrahim
abmayar@amazon.com

Cautionary Language and Forward-Looking Statements
Certain statements in this communication may be considered “forward-looking statements” within the meaning of the federal securities laws, including statements with respect to the Company’s expectations with respect to its future success and performance, including the Company continuing to improve the system performance throughout 2026 as the Company advances on its roadmap; the chiplet-based architecture paving the way toward higher fidelity, higher qubit systems that will ultimately enable fault-tolerant quantum computing; the confidence in the Company’s vision and approach to building the next generation of quantum computers; the improvement to fidelity as the Company scales to higher qubit counts and deploy new systems as we reach important performance milestones while maintaining gate speeds; expectations for Cepheus 1 108Q to reach a median 99.5% two qubit gate fidelity later this year; and intentions to update the technology roadmap later this year. These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by the Company and its management, are inherently uncertain. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: the Company’s ability to achieve milestones, technological advancements, including with respect to its technology roadmap; Company’s ability to deliver products to customers in time or at all, including actions by customers, such as controls over their facilities and cancelling orders; the ability of the Company to obtain government and national contracts successfully and in a timely manner and the availability of such funding; the potential of quantum computing; the success of the Company’s partnerships and collaborations; the Company’s ability to accelerate its development of multiple generations of quantum processors; the outcome of any legal proceedings that may be instituted against the Company or others; the ability to maintain relationships with customers and suppliers and attract and retain management and key employees; costs related to operating as a public company; changes in applicable laws or regulations, including those related to exports; the possibility that the Company may be adversely affected by other economic, business, or competitive factors; the Company’s estimates of expenses and profitability; the evolution of the markets in which the Company competes; the ability of the Company to implement its strategic initiatives and expansion plans; the expected use of proceeds from the Company’s past and future financings or other capital; the sufficiency of the Company’s cash resources; unfavorable conditions in the Company’s industry, the global economy or global supply chain, including rising inflation and interest rates, deteriorating international trade relations, political turmoil, natural catastrophes, warfare, and terrorist attacks; and other risks and uncertainties set forth in the section entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 and other documents filed by the Company from time to time with the Securities and Exchange Commission. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and the Company assumes no obligation and does not intend to update or revise these forward-looking statements other than as required by applicable law. The Company does not give any assurance that it will achieve its expectations.

FAQ

What does Rigetti's April 7, 2026 Cepheus-1-108Q launch mean for RGTI shareholders?

It signals product-scale progress and broader customer access via cloud marketplaces. According to the company, Cepheus-1-108Q validates their chiplet scaling and is available on Rigetti QCS and Amazon Braket, potentially increasing commercial adoption opportunities.

What are the key performance metrics of Rigetti's Cepheus-1-108Q (RGTI)?

Cepheus-1-108Q currently posts a 99.1% median two-qubit fidelity and ~60 ns gate speed. According to the company, the system also shows 99.9% median single-qubit fidelity and prototype two-qubit gates as high as 99.9% at 28 ns.

How is Cepheus-1-108Q delivered to customers and researchers for RGTI stock users?

The system is accessible through Rigetti Quantum Cloud Services and Amazon Braket worldwide. According to the company, Cepheus-1-108Q is the first gate-based device on Braket with over 100 qubits, enabling wider and deeper circuits for customers.

Will Rigetti improve Cepheus-1-108Q fidelity in 2026 and how will that affect RGTI?

Rigetti expects fidelity improvements through 2026 and targets 99.5% median two-qubit fidelity later this year. According to the company, ongoing materials and fabrication work aims to address coherence time limits and raise system performance.

What technical advances enable Rigetti's 108-qubit chiplet design (RGTI)?

Advances include enhanced qubit and coupler design, upgraded control electronics, and an improved fabrication process. According to the company, these innovations reduce defects, improve frequency targeting, and maintain fidelity as qubit counts grow.

How does Cepheus-1-108Q compare to Rigetti's prior 36-qubit system for investors watching RGTI?

Cepheus-1-108Q triples both qubit count and chiplet count versus the 36-qubit system and reports higher gate fidelities. According to the company, the modular chiplet architecture supports scaling to larger systems while preserving gate speed and fidelity.