Dev Slams NVIDIA Isaac Sim as Inefficient, Community Suggests MJX

Yacine MTB, formerly of OpenAI, harshly criticized NVIDIA's Isaac Sim as the most inefficient and embarrassing robot trainer. Commenters suggested switching to MJX (MuJoCo XLA) instead.

2026-08-30 ~ 2026-08-31 · 2 related posts

• Developer roasts Isaac Sim: 'Most horribly inefficient crap trainer' — yacineMTB · 2026-08-30
• Yacine calls Isaac Sim horribly inefficient; reply: just use MJX — cixliv · 2026-08-31