Zhenglun Lou
Post-training @ Anthropic
- Role
- Member of Technical Staff at Anthropic
- Location
- Seattle, WA, US
- LinkedIn followers
- 500 followers
About Zhenglun Lou
I lead Production Post-Training at Anthropic. We train every Claude model that ships (Haiku, Sonnet, Opus, Mythos).We take base models through the full SFT+RL stack and make them helpful, honest, and harmless before they reach users.Previously: YouTube search recommendation & captions at Google, and a past life as an actuary turned data science lead.We\'re hiring in the US and Zurich- US: https://job-boards.greenhouse.io/anthropic/jobs/46••••••08- Zurich: https://job-boards.greenhouse.io/anthropic/jobs/51••••••08
Experience
Member of Technical Staff
Jul 2024 — Present · Seattle, WA, US
TL;DR: I lead the team that trains and ships all Claude models (Haiku, Sonnet, Opus, Mythos).• Started on reasoning, safety, and evals for Claude 3.6 and 3.7 Sonnet, then captained the Claude Opus 4 run.• Founded Production Post-Training after Claude 4 and grew it from 2 to 10+ people. We\'ve trained every Claude since.• Day to day: SFT+RL research, large-scale runs, debugging, tooling, and working with most of the company to ship each model.
Education
Stanford University
Master of Science - MS, Computational and Mathematical Engineering
2020 — 2022
UCLA
Bachelor's degree, Mathematics of Computation (B.S.) and Business Economics (B.A.)
2012 — 2016
Skills
- C++
- Spss
- R
- Cocos2d
- Html
- Python
- Ios Development
- Latex
- Objective-C
- Sql
- Linux
- Css
- Matlab
- Abaqus
- Image Processing
- Vba
- Numerical Analysis
- Microsoft Word
- Sas
- Statistics
- Actuarial Science
- Powerpoint
- Microsoft Excel
- Mathematical Modeling
- Data Analysis
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