Quantinuum unveils Nexus roadmap tied to 2029 Apollo computer

The roadmap has three stages, develop, optimize and deploy. Through 2029, successive releases aim to automate error correction, resource management, orchestration and deployment, Quantinuum said. Developers can already automatically apply supported error-correction techniques to programs and run them on Helios, the company's commercial trapped-ion system.

Nexus launched in 2024 to manage cloud-based quantum workflows. It has expanded into end-to-end application development and deployment, bringing programming, validation, compilation and execution into one environment, according to Quantinuum. The platform provides managed access to software tools and computing resources for hybrid applications and workflows, with cloud and on-premises options.

"Our full-stack approach means each advance in hardware can become a capability customers can build on through Nexus," CEO Rajeeb Hazra said. "Our aim is to build the first developer platform specifically for the fault-tolerant era so customers can start developing applications today and carry that investment forward."

Develop, optimize, deploy

Quantinuum said the roadmap follows the application lifecycle, with each stage adding tools for hybrid quantum-classical work:

• Develop: Pre-built primitives, fault-tolerant libraries and domain-specific tools help developers move from individual circuits to complete applications. The platform will progressively automate error-correction encoding, compilation and resource management.
• Optimize: Tools analyze runtime behavior, resource requirements and application performance. Future releases plan more error suppression, real-time diagnostics and automated error recovery, so customers can run larger computations and use quantum resources more efficiently.
• Deploy: Nexus is designed to coordinate quantum and classical computing across Quantinuum processors, high-performance computing systems, cloud infrastructure and third-party tools, helping customers integrate quantum workflows into existing environments.

Nexus usage and hardware timeline

Nexus supports more than 200 organizations, up 45% in 2026, Quantinuum said. Total job submissions increased tenfold in the 12 months through August 2026 compared with the preceding 12-month period.

Apollo is Quantinuum's first universal, fully fault-tolerant quantum computer, planned for 2029. Sol, Quantinuum's next planned system, remains on schedule for the second half of 2027, and assembly of a Helios system is underway in Singapore ahead of planned commissioning in spring 2027, the company said.

October error-correction result

Quantinuum published the roadmap after reporting 99.9995% logical fidelity on Helios on 19 October, equivalent to five errors per million operations. The company said that was 10 times lower than its September 2026 record and 100 times lower than the best published result across other hardware modalities, which Google Quantum AI reported on a superconducting system. The October run used a color code; the September run used the Helix code. Helix used 10 physical qubits per logical qubit, compared with up to 37 for the color code, while the color code delivered lower logical error rates.

Quantinuum said the performance is within Apollo's target range. Robin Blume-Kohout, co-director of Sandia National Laboratories' Quantum Performance Lab, who was not involved in the study, said the logical qubit was nearly 100 times better than its component physical qubits. He estimated a scaled version could reach the reliability needed for useful fault-tolerant computation with fewer than a million physical qubits.

What happens next

Apollo remains a plan and is not available today. The later stages of the roadmap depend on Apollo, which Quantinuum plans to introduce in 2029. The company said the roadmap is designed so customers can start developing applications now and carry that work forward as its systems become more capable.