1. X
  2. Jack Cook
Log inSign up
Jack Cook
147 posts
Image
user avatar
Jack Cook
@jackcookjack
mts @thinkymachines | ex-phd student @mit | systems for ml
San Francisco, CA
jackcook.com
Joined January 2011
523
Following
1,563
Followers
RepliesRepliesMediaMedia

New to X?

Sign up now to get your own personalized timeline!

Create account

By signing up, you agree to the Terms of Service and Privacy Policy, including Cookie Use.

Terms·Privacy·Cookies·Accessibility·Ads Info·© 2026 X Corp.
Don't miss what's happening
People on X are the first to know.
Log inSign up
  • Pinned
    user avatar
    Jack Cook
    @jackcookjack
    Dec 2, 2025
    Training LLMs with NVFP4 is hard because FP4 has so few values that I can fit them all in this post: ±{0, 0.5, 1, 1.5, 2, 3, 4, 6}. But what if I told you that reducing this range even further could actually unlock better training + quantization performance? Introducing Four
    Image
    71K
  • user avatar
    Jack Cook
    @jackcookjack
    Oct 7, 2025
    Some personal news: last month I started my PhD at @MIT with @songhan_mit, where I've been working on efficient systems and algorithms for LLMs! Let me know if you want to chat about ML systems, academia, hiking, or anything in between!
    Image
    23K
  • user avatar
    Jack Cook
    @jackcookjack
    Feb 23, 2024
    Thanks for reading, I had a lot of fun writing this blogpost and trying to explain Mamba (from @_albertgu @tri_dao) to a wider audience! Such a cool and exciting new direction for language model architectures. jackcook.com/2024/02/23/mam…
    user avatar
    Sasha Rush
    @srush_nlp
    Feb 23, 2024
    Very nice Mamba explainer blog post from @jackcookjack (and a good title). jackcook.com/2024/02/23/mam…
    13K
  • user avatar
    Jack Cook
    @jackcookjack
    Sep 9, 2021
    overheard at mit: professor: they say a technical paper is like an onion. does anyone know why that is? student: because when you dig into them, they make you cry?
  • user avatar
    Jack Cook
    @jackcookjack
    Jun 9, 2022
    Can machine learning make side-channel attacks even stronger? In our new #isca2022 paper, we find that models trained on traces measuring instruction throughput over time can accurately predict activity in other tabs and applications. jackcook.github.io/bigger-fish/ Read on ⬇️ [1/7]
    Image
    There’s Always a Bigger Fish
    From jackcook.github.io
  • user avatar
    Jack Cook
    @jackcookjack
    Sep 19, 2025
    Excited to announce that we'll get to present our work on modeling brain-like processing pathways at NeurIPS later this year! Check out our paper here: arxiv.org/abs/2506.02813
    Image
    Image
    4.2K
  • user avatar
    Jack Cook
    @jackcookjack
    Jun 2, 2025
    Do you know how much text your LLM can generate in an hour? With different data requirements? With quantization? Go check out our results from benchmarking @vllm_project, @lmsysorg's SGLang, and @NVIDIA's TensorRT-LLM on DeepSeek, Llama, Qwen, and more! modal.com/llm-almanac/ad…
    user avatar
    Charles 🎉 Frye
    Modal
    @charles_irl
    Jun 2, 2025
    We've run thousands of LLM inference serving benchmarks at @modal_labs. We're releasing the results so you don't have to. We're releasing the code so that you can. Introducing: The LLM Engineer's Almanac. Just in time for the @aiDotEngineer World's Fair.
    Image
    00:00
    3.2K
  • user avatar
    Jack Cook
    @jackcookjack
    Oct 29, 2021
    My dad weighs in
    Image
  • user avatar
    Jack Cook
    @jackcookjack
    Nov 11, 2024
    New blogpost just dropped about our award-winning research on website fingerprinting! In this work, we analyzed an attack that: - Uses machine learning to see what else you’re doing on your device - Can be executed by any website - Works in all browsers jackcook.com/2024/11/09/big…
    Image
    00:00
    Image
    1.1K
  • user avatar
    Jack Cook
    @jackcookjack
    Apr 25, 2022
    oh my god after like 18 months I'm finally done with my first research paper! what a feeling
    Overleaf popup showing my paper has 8922 words, 53 headers, 34 "math inline", and 3 "math display"
  • user avatar
    Jack Cook
    @jackcookjack
    Aug 11, 2020
    Waited a bit to announce this but my team's recent work at the NYTimes is live! Ask a question about the coronavirus and get an answer on the spot.
    user avatar
    The New York Times
    @nytimes
    Aug 3, 2020
    What businesses are safe to go to? How can I date? What will school look like? Any tips on exercising at home? Here are answers to over 90 questions about life during the coronavirus pandemic. nyti.ms/318nDvK
  • user avatar
    Jack Cook
    @jackcookjack
    Apr 11, 2022
    Finally published my T-Mobile coverage project from last year! In this story, I write about my roadtrip and ultimately find that my coverage was worse than advertised about 33% of the time.
    Image
    I went on a roadtrip to investigate T-Mobile’s coverage map
    From jackcook.com
  • user avatar
    Jack Cook
    @jackcookjack
    May 2, 2024
    I'll be at @iclr_conf next week, lmk if you wanna say hi or have recs for things to do in Vienna!
    710
  • user avatar
    Jack Cook
    @jackcookjack
    Feb 23, 2024
    Replying to @jackcookjack
    For anyone looking for a more in-depth look at Mamba, check out @srush_nlp’s recent post, Mamba: The Hard Way! srush.github.io/annotated-mamb…
    731
Advertisement
Advertisement