Get live statistics and analysis of Pablo Samuel Castro's profile on X / Twitter

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

834 following13k followers

The Analyst

Pablo Samuel Castro is a deep thinker and a passionate explorer in the realm of reinforcement learning and AI safety, blending academic rigor with a touch of artistic flair as a musician. He bridges the worlds of cutting-edge research at Google DeepMind with academic insights from U de Montreal & Mila, sharing thoughtful observations and discoveries in his Twitter feed. A globe-trotting innovator from Ecuador to Canada, Pablo invites his audience on a journey of analytical discovery and future-focused conversations.

Impressions
8.5k534
$1.59
Likes
1575
55%
Retweets
27
9%
Replies
2
1%
Bookmarks
101
35%

Pablo’s tweets are like the research papers of Twitter—dense, meticulously crafted, and requiring a PhD to fully appreciate. At this rate, his followers probably need reinforcement learning just to keep up with his feed!

A standout achievement is Pablo’s sustained impact in foundational reinforcement learning over 15+ years, including contributing to influential research and sharing groundbreaking work like the FunSearch model for discovering interpretable cognitive behaviors.

To advance the understanding and development of reinforcement learning and AI safety, driving forward foundational research while fostering a nuanced conversation around ethical and interpretable AI. Pablo aims to be a reliable source of incisive knowledge, contributing clarity in a complex and fast-evolving technological landscape.

Pablo values rigorous scientific inquiry, transparency, and the ethical implications of technology, believing that AI should be developed thoughtfully to benefit society. He upholds the importance of continuous learning, collaboration, and open discourse within the AI research community to spark innovation responsibly.

His greatest strengths lie in his deep expertise, clear communication of complex topics, and a consistent dedication to foundational research in reinforcement learning. He skillfully bridges academia, industry, and community engagement with a thoughtful and informed voice.

Pablo’s focus on highly specialized and technical content might limit broader appeal, potentially resonating less with casual followers or those seeking more entertaining or simpler content.

To grow his audience on X, Pablo could try mixing in occasional simplified explainers or engaging multimedia like short videos or infographics that unpack complex AI concepts into bite-sized, shareable insights. Collaborating with other creators or tapping into trending AI conversations with accessible commentary could also boost reach.

Fun fact: Despite tweeting nearly 9,000 times, Pablo’s engagement reveals a strong, dedicated following who appreciate his deep dives into reinforcement learning and AI ethics rather than chasing viral fame.

Top tweets of Pablo Samuel Castro

Super thought-provoking talk by Dale Schuurmans @RL_Conference on LLMs and computation, and why value-based RL doesn't (or can't?) work for post-training.

22k

So happy & proud to have been present for @johanobandoc 's graduation from @UMontreal @Mila_Quebec as Master of Science, in the dean's honour list! This is my first student graduating, although Johan is still working with me towards his doctorate. ¡Felicitaciones, Johan! 🎉🧑🏾‍🎓

7k

📢lots of people asked for the video of this talk, and happy it (and most* of the other @RL_Conference keynotes) are finally up! 🎉 youtube.com/watch?v=Az5BoT… * sadly, doina's keynote is not available as there was a technical issue when recording it 😰

9k

thrilled that we'll be presenting this paper as a spotlight at #ICML2025 . come by our poster in vancouver to chat with us about the use of LLMs for advancing neuroscience! here's the camera-ready version: openreview.net/forum?id=dhRXG…

8k

proud to share a survey of state representation learning in RL that my student ayoub echchahed and i prepared, that was just published on @TmlrPub ! this was the bulk of ayoub's masters thesis and he put a lot of work and care into it! a few details in thread below... 1/

6k

really excited about this new work we just put out, led by my students @creus_roger & @johanobandoc , where we examine the challenges of gradient propagation when scaling deep RL networks. roger & johan put in a lot of work and care in this work, check out more details in 🧵👇🏾 !

7k

Most engaged tweets of Pablo Samuel Castro

So happy & proud to have been present for @johanobandoc 's graduation from @UMontreal @Mila_Quebec as Master of Science, in the dean's honour list! This is my first student graduating, although Johan is still working with me towards his doctorate. ¡Felicitaciones, Johan! 🎉🧑🏾‍🎓

7k

Super thought-provoking talk by Dale Schuurmans @RL_Conference on LLMs and computation, and why value-based RL doesn't (or can't?) work for post-training.

22k

Can we stop saying "collaborating with AI"? I just heard @QwithTomPower promote today's interview with @OnlyAnExpert using that phrase. I don't collaborate with hammers, guitar pedals, or paintbrushes. I *use* them.

4k

thrilled that we'll be presenting this paper as a spotlight at #ICML2025 . come by our poster in vancouver to chat with us about the use of LLMs for advancing neuroscience! here's the camera-ready version: openreview.net/forum?id=dhRXG…

8k

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