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![muskonomy Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1683336596488327168.png) Muskonomy [@muskonomy](/creator/twitter/muskonomy) on x 27.1K followers
Created: 2025-07-21 21:09:22 UTC

🚨BREAKING: Ethan He joins xAI after X years at NVIDIA

One of NVIDIA’s top AI minds is now part of xAI  team.

Here’s what Ethan achieved before joining xAI:

• Led COSMOS, a state-of-the-art world model
• Open-sourced the first recipe for upgrading 100B+ MoE models (64+ experts)
• Helped grow NeMo from 10k → 15k⭐️ on GitHub
• Known for bridging research with real-world tools
• worked at Meta AI, Carnegie Mellon, 8k+ academic citations

![](https://pbs.twimg.com/media/GwaRMztbEAYQlIK.jpg)

XXXXXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1947403552294613078/c:line.svg)

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[$nvda](/topic/$nvda)
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[Post Link](https://x.com/muskonomy/status/1947403552294613078)