Unreal Engine 5.9 Preview is first version mostly built by AI agents

Epic Games has released Unreal Engine 5.9 Preview, the first engine version built primarily by agentic AI workflows, completed in roughly one week and including a new web platform.

2026-11-09 ~ 2026-11-11 · 2 related posts

• Unreal Engine 5.9 preview is the first UE release built primarily with agentic workflows — nicolascraske · 2026-11-09
• Unreal Engine 5.9 Preview is the first engine release built mostly by AI agents — nicolascraske · 2026-11-11