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![kimmonismus Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1573399256836309009.png) Chubby♨️ [@kimmonismus](/creator/twitter/kimmonismus) on x 80K followers
Created: 2025-07-16 06:20:01 UTC

Meta has bought out key OpenAI scientists. This is bigger than you might think

Jason Wei and Hyung Won Chung are key research scientists.

Jason Wei's research role:

- Chain-of-thought prompting (reasoning through multi-level thought guidance)
- Emergent abilities in LLMs and instruction tuning
- Deep research projects and RL-based training approaches, especially on the o1/o3 model

Hyung Won Chung:

- Reasoning & agent models
- Central role in the development of o1-Preview, o1-Final and Deep Research
- Work on coding agents (“Codex mini”)

Heavy blow for OpenAI


XXXXXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1945367802577146004/c:line.svg)

**Related Topics**
[open ai](/topic/open-ai)
[meta](/topic/meta)

[Post Link](https://x.com/kimmonismus/status/1945367802577146004)