Hi, I’m Evan

I am currently a member of technical staff at Arena, working on evals—specifically large-scale, real-world agentic evaluations. I’m particularly interested in measurement, and in how to turn measurements into future improvements in capability.

Before Arena, I finished my master’s and bachelor’s at UC Berkeley. During this time, I worked on reward model training and evaluation. I’ve been lucky to be mentored by Ion Stoica, Jiantao Jiao, Banghua Zhu, Anastasios Angelopoulos, and Wei-Lin Chiang.

I also worked at Nexusflow, where I trained open-weights LLMs like Athene-70B and Athene-V2-Chat.

Most generally, I want to help build better AI for humans.

Selected Work

Factuality in the Arena [Arena Blog 2026]

Auditing millions of claims made by LLMs in Text and Search Arena battles to construct factuality-aware leaderboards.

Prompt-to-Leaderboard [ICML 2025]

Evan Frick*, Connor Chen*, Joseph Tennyson*, Tianle Li*, Wei-Lin Chiang*, Anastasios N. Angelopoulos*, and Ion Stoica. (2025).

How to Evaluate Reward Models for RLHF [ICLR 2025]

Evan Frick, Tianle Li, Connor Chen, Wei-Lin Chiang, Anastasios N. Angelopoulos, Jiantao Jiao, Banghua Zhu, Joseph E. Gonzalez, and Ion Stoica. (2024).

Starling-7B: Improving Helpfulness and Harmlessness with RLAIF. [COLM Spotlight]

Banghua Zhu*, Evan Frick*, Tianhao Wu*, Hanlin Zhu, Karthik Ganesan, Wei-Lin Chiang, Jian Zhang, and Jiantao Jiao. (2024).

From Crowdsourced Data to High-Quality Benchmarks: Arena-Hard and BenchBuilder Pipeline.

Tianle Li*, Wei-Lin Chiang*, Evan Frick, Lisa Dunlap, Tianhao Wu, Banghua Zhu, Joseph E. Gonzalez, and Ion Stoica. (2024).

Athene-70B: Redefining the Boundaries of Post-Training for Open Models.

Evan Frick*, Peter Jin*, Tianle Li*, Karthik Ganesan, Jian Zhang, Jiantao Jiao, and Banghua Zhu. (2024).

Experience

Jul 25 – Present
Arena
Member of Technical Staff · Full-time

Evaluations.

Apr 24 – Present
Sky Lab
Researcher · Part-time

Chatbot Arena and reward models.

Nov 23 – Jul 25
Nexusflow
Machine Learning Engineer · Full-time

RLHF and function calling.

Aug 23 – Jul 25
Berkeley Artificial Intelligence Research
Researcher · Part-time

RLAIF and synthetic data. Advised by Professor Jiantao Jiao.

May 23 – Aug 23
Microsoft
Software Engineer Intern · Full-time

Change tracking and analytics system.

Jan 23 – May 23
UC Berkeley CDSS
Undergraduate Researcher · Part-time

ViT robustness in dermatology.

May 22 – Aug 22
Microsoft
Software Engineer Intern · Full-time

Secure server allocation systems.

Jun 21 – Aug 21
Chess.com
Software Intern · Full-time

Made buttons button, clicks click, and moves move.

Education

2024 – 2025
UC Berkeley Electrical Engineering and Computer Science

M.S. in Electrical Engineering and Computer Science.

2020 – 2024
UC Berkeley Computing, Data Science, and Society

B.A. in Computer Science, Minor in Data Science, Highest Distinction in General Scholarship.

Contact

Email: evanfrick[at]berkeley[dot]edu

Google Scholar: Evan Frick

LinkedIn: Evan Frick

Twitter: @evan_a_frick