Zhifei Li

@andylizf

CS PhD @PrincetonCS. Building AI systems & infra. Prev @BerkeleySky & @ruc1937

zhifei.li

Joined July 2022

Replies Reposts Media

Zhifei Li
@andylizf
Sep 2
Gen time: 11s Watch time: 14s I am now the bottleneck. Congrats Haocheng!!
Haocheng Xi
@HaochengXiUCB
Sep 2
Open-source video generation is now faster than playback without compromising quality. Introducing Video Delta Net (VDN): hybrid attention for live text-to-video with near-lossless quality. VDN accelerates Minimax-H3 by 75 - 90 x, generating 14 seconds of 768p video in 11
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Zhifei Li
@andylizf
Jul 28
My first SkyPilot PR, in Sept 2024, fixed syntax highlighting in one docs code block. 51 merged PRs later it's a company. Congrats @zongheng_yang @Michaelvll1 and the team. @tian_xia_ reviewed most of those 51, thank you!
SkyPilot
@skypilot_org
Jul 24
Fresh out of stealth, and our first announcement belongs to the community: SkyPilot open source has hit 10,000 GitHub stars ⭐ We are now powering AI infra for frontier teams from neolabs to Fortune 500 enterprises, across 25+ clouds, Kubernetes, and on-prem. Every star, issue,
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Zhifei Li
@andylizf
Jun 24
Your coding agent reads every web page wrong. And pays 2.5x extra to do it. pixelbrowse fixes it with one screenshot. −74% tokens, 4x faster. give Claude Code eyes. 👀 New: pixelbrowse. 𝚙𝚒𝚙 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚙𝚒𝚡𝚎𝚕𝚛𝚊𝚐 · github.com/StarTrail-org/…
GIF
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Zhifei Li
@andylizf
May 25
congrats Zihan! excited to read RAGEN-2
Zihan "Zenus" Wang
@wzenus
May 24
RAGEN-2 is selected as ICML oral! Congrats and great appreciation to all collaborators!!
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Zhifei Li
@andylizf
May 23
Codex basically replaced OpenClaw for me at this point but the part I like most here is “memory as markdown files” pretty refreshing to hear that from someone on the Codex team. model companies usually have every reason to want memory lock-in 🙄
jason
@jxnlco
May 20
Article
Getting the most out of Codex
Most developers first use coding agents for code: inspect a repository, make a diff, run tests, and open a pull request. That’s still the center of gravity for Codex. But much of the work on a...