# Quantinuum quantum computing development > Developing situation record from CLSTR: https://clstr.news/situations/quantinuum-quantum-computing-development > Updated: 2026-11-05T13:30:19.000Z. Sources: 2. Developments: 2. Quantinuum has reported significant advancements in its pursuit of fault-tolerant quantum computing. In October 2026, the company announced a breakthrough in quantum error correction using its Helios trapped-ion system, achieving a logical memory fidelity of 99.9995%. This result represents a 100-fold improvement over certain competing hardware technologies and serves as a milestone toward the development of Apollo, a planned universal fault-tolerant quantum computer targeted for 2029. Following this technical milestone, Quantinuum unveiled a roadmap for its Nexus platform as a service in November 2026. The Nexus platform is designed to serve as a developer platform for the fault-tolerant era, integrating application development with successive hardware generations. The platform aims to automate processes such as error-correction encoding and resource management, allowing developers to execute applications at the logical level. ## Timeline ### 2026-11-05: Quantinuum unveils roadmap for fault-tolerant quantum developer platform Quantinuum announced a roadmap for its Nexus platform, aiming to deliver a developer platform for the fault-tolerant quantum era, including the planned 2029 launch of its Apollo quantum computer. 2 sources. https://clstr.news/cluster/quantinuum-unveils-roadmap-for-fault-tolerant-quantum-developer-platform ### 2026-10-19: Quantinuum sets quantum error correction record with Helios system Quantinuum's Helios quantum computer has set a new record with 99.9995% logical fidelity, achieving only five errors per million operations and paving the way for its 2029 fault-tolerant Apollo system. 4 sources. https://clstr.news/cluster/quantum-computing-firms-report-major-breakthroughs-in-error-correction --- Cite as: Quantinuum quantum computing development. CLSTR, https://clstr.news/situations/quantinuum-quantum-computing-development