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Kai
445 posts
user avatar
Kai
@kaicathyc
Occasionally here. Currently research @OpenAI.
kaicathy.com
Joined February 2013
242
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15.2K
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  • user avatar
    Kai
    @kaicathyc
    Apr 25, 2025
    Hello tweeter. I’ll be in Vancouver for an indeterminate amount of time! I have no friends there so would be excited about meeting new people :) Hopefully will return home sometime this year but if not shall make the best of it.
    user avatar
    Noam Brown
    @polynoamial
    Apr 25, 2025
    It's deeply concerning that one of the best AI researchers I've worked with, @kaicathyc, was denied a U.S. green card today. A Canadian who's lived and contributed here for 12 years now has to leave. We’re risking America’s AI leadership when we turn away talent like this.
    243K
  • user avatar
    Kai
    @kaicathyc
    Apr 26, 2025
    want to add that OpenAI has been incredibly supportive during this kerfuffle. initial application was filed almost 3! years! ago before my time here - really sucks to get denied after waiting for so long and unable to return home, but all in all feel very lucky to be where i am
    user avatar
    Noam Brown
    @polynoamial
    Apr 26, 2025
    Update: It sounds like there might have been paperwork issues with the initial green card filing (done over 2 years ago). It's still a shame that this means @kaicathyc has to leave the US for a while but there's reason for optimism that this will all be resolved.
    222K
  • user avatar
    Kai
    @kaicathyc
    Feb 27, 2025
    It was a *character-building* privilege to post-train GPT 4.5
    user avatar
    Sam Altman
    OpenAI
    @sama
    Feb 27, 2025
    GPT-4.5 is ready! good news: it is the first model that feels like talking to a thoughtful person to me. i have had several moments where i've sat back in my chair and been astonished at getting actually good advice from an AI. bad news: it is a giant, expensive model. we
    173K
  • user avatar
    Kai
    @kaicathyc
    Aug 5, 2025
    Enjoy these lil models. A lot of people worked very hard on them :)
    user avatar
    OpenAI
    @OpenAI
    Aug 5, 2025
    Our open models are here. Both of them. openai.com/open-models
    44K
  • user avatar
    Kai
    @kaicathyc
    Nov 20, 2023
    OpenAI is nothing without its people
    82K
  • user avatar
    Kai
    @kaicathyc
    Jan 17, 2024
    I’m hiring software / research engineers to work on government and non-profit initiatives at OpenAI on the Applied Research Team! 🐸
    117K
  • user avatar
    Kai
    @kaicathyc
    Feb 27, 2025
    Replying to @kaicathyc
    Only a little over a year ago, the largest model I had ever trained was a wee 6 layer transformer with @karpathy’s nanoGPT library. But here we are.
    87K
  • user avatar
    Kai
    @kaicathyc
    Nov 19, 2023
    💜
    user avatar
    Sam Altman
    OpenAI
    @sama
    Nov 19, 2023
    i love the openai team so much
    35K
  • user avatar
    Kai
    @kaicathyc
    Apr 14, 2025
    new workhorse for developers working with openai models 🚀 4.1 is what happens when people who touch grass (understand user needs) relentlessly execute on research
    70K
  • user avatar
    Kai
    @kaicathyc
    Feb 27, 2025
    Replying to @kaicathyc and @karpathy
    Special shoutout to @rapha_gl, my closest collaborator on post-training Orion and one of my favorite people currently alive. You were hot in the livestream.
    26K
  • user avatar
    Kai
    @kaicathyc
    Dec 5, 2023
    finally got a grelfie w/ @gdb
    user avatar
    Greg Brockman
    OpenAI
    @gdb
    Dec 5, 2023
    18 team meetings and 1:1s today. Continue to be blown away by the level of everyone’s focus and grit.
    33K
  • user avatar
    Kai
    @kaicathyc
    Aug 5, 2025
    Open-weights can’t go back in the box. Before permanently releasing gpt-oss models into the ecosystem, we estimated marginal frontier risk by deliberately eliciting bio/cyber capabilities via malicious fine-tuning (MFT).
    user avatar
    Eric Wallace
    @Eric_Wallace_
    Aug 5, 2025
    Today we release gpt-oss-120b and gpt-oss-20b—two open-weight LLMs that deliver strong performance and agentic tool use. Before release, we ran a first of its kind safety analysis where we fine-tuned the models to intentionally maximize their bio and cyber capabilities 🧵
    22K
  • user avatar
    Kai
    @kaicathyc
    Dec 30, 2024
    growing up is realizing there are no adults in the room
    11K
  • user avatar
    Kai
    @kaicathyc
    Apr 26, 2025
    Replying to @willdepue and @karinanguyen
    I’m in coding jail
    3.9K