Pablo Samuel Castro

@pcastr

Señor swesearcher @ Google DeepMind. Adjunct prof @ U de Montreal & Mila. Musician. From 🇪🇨 living in 🇨🇦.

Ottawa/Montreal, QC

psc-g.github.io

Joined December 2009

841 Following

14.9K Followers

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Pablo Samuel Castro
@pcastr
Mar 8, 2025
thrilled to finally put out the second release from my musical project "the 45s" with my buddy JS Diallo! (links in thread)
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Pablo Samuel Castro
@pcastr
Oct 26
while working on agentick (to be presented at NeurIPS'26), @creus_roger found that ASCII inputs seemed to really help LLMs during his internship at @VmaxAI he pushed on this idea and came up with GlyphBench, which serves as a benchmark, a research tool, & post-training suite!
Vmax
@VmaxAI
Oct 23
1/ 🎮 Can training on games improve LLM reasoning? Introducing GlyphBench: 360+ game tasks for language-model RL. We use it as a benchmark, a research tool, and a post-training suite. 🧵⬇️
Pablo Samuel Castro
@pcastr
Oct 2
Congrats @natolambert ! I agree the community needs this type of work and investment, and you're one of the best people I can think of to lead it. Love the name and its explanation as well!
Nathan Lambert
@natolambert
Oct 2
Today we're unveiling Trillium Labs @trillium_labs, a new non-profit to foster the open science of frontier AI. We're building open post-training recipes and will expand into open infra to study RSI, reward-hacking, multi-agent systems, and whatever comes next. We're built
Pablo Samuel Castro
@pcastr
Sep 15
In 2012 I thought I had left ML research forever, until @hugo_larochelle brought me into Google brain in Montreal. I remain forever grateful for him believing in me and for guiding me during his time at Google. I feel honoured to call him a friend and colleague!
Sara Hooker
@sarahookr
Sep 14
Very happy to see this profile of @hugo_larochelle Before I join Google Brain, I watched all his lectures from Sheffield. You have to remember at the time, all of the knowledge for deep learning belong to less then 100 people. He made it available to many more. He became my
Pablo Samuel Castro
@pcastr
Aug 24
Seems like a great opportunity working with great people and resources!
Jakob Foerster
@j_foerst
Aug 21
TL;DR: This is one of the most important and exciting opportunities in AI on the planet - please read on. The British Open-ended Learning & Discovery Lab is creating the perfect place for paradigm breaking AI research in the name of open-source and open-science. We have agency,

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