Hy4 Preview builds complex Three.js temple in 87 minutes

ShunyuYao12 · x · 2026-08-28

A user demo highlights the capabilities of Hy4 Preview, showing it spent 1 hour and 27 minutes thinking, building, and verifying a Pagoda Temple in Three.js.

The model reportedly features 49B active parameters and represents a significant jump over Hy3, boasting better planning and execution. This underscores the intensifying race in model performance for complex, long-horizon coding tasks.

Original post →

More from Models

Models channel →