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EH
Engineer

Ethan He

Engineer, formerly lead on NVIDIA Cosmos, built Grok Imagine at xAI at xAI

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Ethan He is an engineer who formerly led on NVIDIA Cosmos and built Grok Imagine at xAI.

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Why Video Agent models are next — Ethan He, xAI Grok Imagine
Latent SpacepositiveJun 2, 2026

“Lead engineer who built NVIDIA's Cosmos world model and then joined xAI to build Grok Imagine in three months, now focusing on LLMs and world models for video generation.”

Building Grok Imagine in 3 months and Video Agents
SubstackpositiveJun 2, 2026

“Led development of Grok Imagine video model in 3 months at xAI; previously worked on NVIDIA Cosmos world model; expert on video generation, world models, and diffusion transformers.”