# Kosic helped build the infrastructure behind Colossus, the supercomputer powering Grok.

*fintech · news · 2026-04-07 · TechStartups.com*

## Key points

- Jeff Bezos's Project Prometheus has hired xAI co-founder and ex-OpenAI engineer Kyle Kosic.
- Every original co-founder from xAI has now left the company, signaling major internal shifts.
- Project Prometheus raised $6.2 billion at launch, making it one of the best-funded AI startups.
- The startup focuses on AI that understands the physical world, targeting industries like manufacturing and aerospace.
- Bezos is exploring a Berkshire Hathaway-style holding structure and partnerships with sovereign funds for Prometheus.

**Companies:** Amazon, xAI, OpenAI
**Countries:** United States, Singapore, United Kingdom, Switzerland

[Read the full story on TechStartups.com](https://techstartups.com/2026/04/07/jeff-bezoss-project-prometheus-poaches-xai-co-founder-from-openai-in-escalating-ai-talent-battle/)

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