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Personnel: Jason Wei at Google Brain (Research Scientist)

Verdictpartial85%
1 check · 4/9/2026

The source confirms Jason Wei's name, role as research scientist, and employment at Google Brain. However, the endDate of 2023 is only partially confirmed. The source states he was at Google Brain 'before' his time at OpenAI (2023-2025), which indicates he left Google Brain around 2023, but the exact end date is not explicitly stated. The source does not provide a specific start date of 2020 for his Google Brain position, making that field unverifiable. The record is incomplete regarding the precise dates of his Google Brain tenure.

Our claim

entire record
Person
Jason Wei
Role
Research Scientist
Role Type
career
Start Date
2020
End Date
2023
Is Founder
No
Notes
Discovered chain-of-thought prompting and emergent abilities in large language models

Source evidence

1 src · 1 check
partial85%Haiku 4.5 · 4/9/2026

NoteThe source confirms Jason Wei's name, role as research scientist, and employment at Google Brain. However, the endDate of 2023 is only partially confirmed. The source states he was at Google Brain 'before' his time at OpenAI (2023-2025), which indicates he left Google Brain around 2023, but the exact end date is not explicitly stated. The source does not provide a specific start date of 2020 for his Google Brain position, making that field unverifiable. The record is incomplete regarding the precise dates of his Google Brain tenure.

Case № vI3L1ZV6naFiled 4/9/2026Confidence 85%
Source Check: Personnel: Jason Wei at Google Brain (Research Scientist) | Longterm Wiki