Jianheng (Jaden) Hou

I work on agentic AI — and on the infrastructure, evaluation, and ML systems that take an idea from research to something that holds up in production.

Jianheng (Jaden) Hou
01

About

I've never found a clean line between being a researcher and being an engineer. The problems worth working on need both at once — the instinct to chase what matters, and the rigor to make it hold up in the real world. That overlap is where I do my best work.

I'm a Senior Machine Learning Engineer at Tesla. My work centers on agent systems — infrastructure, orchestration platform, harness, memory, apps, and benchmarks — along with enterprise ontology, multimodal recommendation, vision perception, and distributed systems. My current focus is building superintelligence (SI)–driven manufacturing and service solutions for Tesla's vehicles and Optimus. Along the way, I've been fortunate to be recognized as one of Tesla's Most Impactful People (2024) and as Top Talent in 2025 and 2026.

Interests & research focus

02

Experience

Outer ring, the lens. Inner ring, the craft.

My path runs through AI and manufacturing, media and telecom, and venture capital — most recently at Tesla, where I engineer enterprise AI and agentic systems from first principles, into products that ship under real constraints. At Comcast, I was in an enterprise ML/DS rotation, using data science and machine learning for 360° decision support across product, user growth, finance, and workforce. At Alpha Edison, I built an ML and quantitative decision engine for investing, to surface the silent pain points of consumers in vertical industries and move value through those industries by proactively backing high-potential startups. I take concrete problems and abstract them into research problems. At the University of Southern California's Information Sciences Institute, on the DARPA LORELEI THOR Project, that meant knowledge graphs, entity resolution, and online clustering, later applied in U.S. DoD settings, mentored by Pedro Szekely and Mayank Kejriwal. I hold an M.S. in Computer Science (Applied Data Science) from the Viterbi School of Engineering at the University of Southern California.

03

News

Oct 2026
AgentPersonaBench (APB) — a benchmark for whether persona traits actually steer what agents do — went public. Paper →
Sep 2026
SkillsBench — benchmarking how well agent skills work across diverse tasks — was accepted to NeurIPS 2026. Paper →
Aug 2026
Matraix was featured on Hugging Face Daily Papers and covered by Forbes, WIRED (Czech), NZZ am Sonntag, Numerama, Infobae, AI타임스, and 36Kr, among others — and trended as an X Trending Story.
Aug 2026
We released the Matraix technical report — a world-simulation platform with 8.3 billion persona agents — on arXiv, published the Persona 1M dataset on Hugging Face, and open-sourced the platform as MatrAIx-Persona-8B (2k+ ★). Paper →
Jul 2026
PersonaEval and Position: Synthetic Persona Needs Explicit Grounding were accepted to the COLM 2026 Workshop on Social Simulation with LLMs.
Apr 2026
A Very Big Video Reasoning Suite was accepted to ICML 2026. Paper →
04

Research

Matraix

Matraix: Simulating the World with 8.3 Billion Persona Agents

Xiaomin Li, Yuexing Hao, Jianheng Hou, Jintao Huang, Qianfeng Wen, Shirley Huang, Yifan Liu, Xiaoyi Liu, Yilan Fan, …, Marinka Zitnik, James Zou, Philip Torr, Emily Fox, Asu Ozdaglar, Dawn Song

A population-scale, persona-driven infrastructure that instantiates 8.3B persona agents to evaluate AI systems and interactive products across surveys, chatbots, web, and apps.

AgentPersonaBench

AgentPersonaBench: Benchmarking Persona-Driven User Simulation

Jintao Huang, Yifan Wang, Hongyu Shen, Yi Daniel Lu, Shirley Huang, …, Yifan Simon Liu, Jianheng Hou, … et al.

A benchmark for latent persona adherence — 2,460 tasks across survey, chat, web, and desktop app, scored from what the agent does, not what it says about itself.

PersonaEval

PersonaEval: Persona-Based User Simulation for Evaluating Interactive Applications

Yifan Simon Liu, Qianfeng Wen, Yilan Fan, Shirley Huang, Ruoqi Gao, Jianheng Hou, Muhammad Ahmed Mohsin, Zonglin Di, Brihi Joshi, … et al.
COLM 2026 WorkshopProjectPaper

A plug-and-play persona-based user-simulation framework for repeatable, parallel evaluation of surveys, chatbots, and web applications.

A Very Big Video Reasoning Suite

A Very Big Video Reasoning Suite

Maijunxian Wang, Ruisi Wang, Juyi Lin, Ran Ji, Thaddäus Wiedemer, …, Jianheng Hou, …, Dahua Lin, Ziwei Liu, Lei Yang, Zhongang Cai, Hokin Deng

An unprecedentedly large-scale video-reasoning suite — 1M+ clips across 200 tasks with a verifiable, human-aligned benchmark — powering one of the first video-reasoning scaling studies.

SkillsBench

SkillsBench: Benchmarking How Well Agent Skills Work Across Diverse Tasks

Xiangyi Li, Yimin Liu, Wenbo Chen, Bingran You, Zonglin Di, …, Jianheng Hou, …, Yizhou Sun, Wei Wang, Dawn Song
NeurIPS 2026ProjectPaper

A paired benchmark that measures whether curated Agent Skills actually help LLM agents, using deterministic verifiers across 87 tasks and 8 domains.

Video Deep Research

Watching, Reasoning, and Searching: A Video Deep Research Benchmark on the Open Web for Agentic Video Reasoning

Chengwen Liu, Xiaomin Yu, Zhuoyue Chang, Zhe Huang, Shuo Zhang, Heng Lian, Jisheng Dang, Rui Xu, Sen Hu, Jianheng Hou, … et al.
arXiv 2026Paper

The first video deep-research benchmark requiring cross-frame anchor extraction, open-web retrieval, and multi-hop reasoning over joint video–web evidence.

Chain of Risk

Chain of Risk: Safety Failures in Large Reasoning Models and Mitigation via Adaptive Multi-Principle Steering

Xiaomin Li, Jianheng Hou, Zheyuan Deng, Zhiwei Zhang, Taoran Li, Binghang Lu, Bing Hu, Yunhan Zhao, Yuexing Hao
arXiv 2026Paper

Diagnoses safety failures in large reasoning models and mitigates them with adaptive, multi-principle activation steering.

Position: Synthetic Persona

Position: Synthetic Persona Needs Explicit Grounding and Standardized Reporting

Yucheng Lu, Xiaoyi Liu, Heming Liu, Hanwen Xing, Shirley Huang, …, Jianheng Hou, … et al.
COLM 2026 WorkshopProjectPaper

Argues that synthetic personas in LLM social simulation need explicit grounding, and proposes lightweight provenance and reporting standards.

Full list on Google Scholar →

05

Open Source

MatrAIx-Persona-8B

MatrAIx-Persona-8B

Open Source · 2k+ ★GitHubWebsiteHuggingFacePaper

Lead builder & core architect. I drove the end-to-end design and engineering of this population-scale, persona-driven infrastructure — from the 1,290-dimension persona schema and 1M-persona public coreset to the simulation runtime and evaluation pipeline.

AgentPersonaBench

AgentPersonaBench

Open tasks, harness, and leaderboard for whether a persona trait actually steers agent behavior across survey, chat, web, and desktop-app environments.

Dify

Dify

Open SourceGitHub

Contributor to the popular open-source platform for building agentic workflows and RAG pipelines, with rich AI model and tool support — moving teams from prototype to production.

SPAgent

SPAgent

Open SourceGitHubPaper

A foundation agent for perception, reasoning, and action in the physical & spatial world — a modular, open-ended ecosystem of expert tools spanning 2D vision, 3D reconstruction, world modeling, and video/image generation.

06

Service

Reviewer
IEEE Transactions on Knowledge and Data Engineering (TKDE), 2026
Reviewer
Conference on Language Modeling (COLM), 2026
Reviewer
KDD 2026 Workshop on Agentic AI
07

Away from work

Alpine Skiing
Carving steep terrain with speed and precision.
Scuba Diving
Free diving and catching lobster to share with friends.
Camping
Finding stillness and clarity deep in nature.
Strength Training
Sustaining energy and balance with a daily endorphin boost.
Music
Living between EDM (melodic & progressive house) and hip-hop (trap, drill).
Travel
Local-driven, not the checklist kind — staying long enough to eat, talk, and move with the place.