Huawei Cloud CodeArts ships Harmony coding LLM tuned for ArkTS

On September 21, 2026, Huawei Cloud upgraded its CodeArts coding agent for HarmonyOS developers, launching a Harmony coding LLM, the CodeArts Harmony agent and a Harmony developer practice center. Huawei claims thousand-line error rates fell over 80%, one-shot compile pass rates rose over 78% and token use per task dropped over 20%.

• Model trained on over 1M Harmony materials and 100,000 samples
• Thousand-line error rates fell by more than 80%
• One-shot compile pass rates rose by more than 78%
• Agent embeds DevEco CLI for builds and simulator previews