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Researcher · Founder

Karina Nguyen

ThoughtfulFounder

Nguyen founded Thoughtful, where she helped create PostTrainBench to test whether AI agents can improve other language models.^[1] She previously helped develop OpenAI's reasoning models and GPT-4o and worked on making Anthropic's Claude models more helpful, honest, and safe.^[2]

Fields

Post-Training AI Alignment Human-Computer Interaction

Categories

10K–50K citations

Links

Career & education

Current role

Founder

Previously

OpenAI2024-2025

Member of Technical Staff

Anthropic2022-2024

Member of Technical Staff

Education

Work and education history is primarily focused on AI-relevant roles and may not be comprehensive.

Citation Trend

Total citations to scholarly work, including research papers, technical reports, books and theses, as recorded by Google Scholar. Each point is a dated snapshot.

2 snapshots

citations10,596As of Nov 13, '26

citations+1,724Since last snapshot, Aug 22, '26

For today’s citation count and per work, visit Google Scholar.

References

Karina Nguyen — Introducing PostTrainBenchthoughtfullab.com
Karina Nguyen — Research and professional backgroundkarinanguyen.com
Founding Thoughtful and contributions to OpenAI reasoning models, GPT-4o, and Claude post-training.

About this profile

Based on public sources. If accuracy is important, verify details using the links or references.

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Reviewed August 22, 2026 · Checked for accuracy and new information.