Ben Ellis

Can you solve MARL tasks without conditioning the policy on the observation? In our new paper we investigate the popular StarCraft micromanagement benchmark SMAC and discover that most scenarios do not require the observation to be used! [1/N]

@nathanrmonette @EugeneVinitsky @nyutandon @FLAIR_Ox Congratulations!

Excited to announce I’ll be joining @EugeneVinitsky at @nyutandon this autumn for a PhD! I will be working on the intersection of game theory, reinforcement learning, and autonomous vehicles. Thanks to everyone who helped me get to this point, especially from @FLAIR_Ox :)

Welcome @joespeez to the Reflection team, it's great to have you as our VP of Product & Head of Open Source.

BREAKING: Llama lead @joespeez is joining Reflection as VP of Product & Head of Open Source

We are hiring up to two postdocs @FLAIR_Ox: my.corehr.com/pls/uoxrecruit… FLAIR is an extreme outlier in talent density X agency X resources X fun. If this sounds exciting, please apply. Deadline is 31st of March AOE. Looking for a place where you can cook and ship in peace? Join us.

Very excited to share that Reflection is partnering with Shinsegae Group to build a 250-megawatt AI factory for South Korea. I believe this is a sign of things to come and it's a privilege to be part of it.

@reflection_ai @WSJ Super cool to be part of this mission!

Reflection is partnering with Shinsegae Group to build a 250-megawatt sovereign AI factory for the Republic of Korea. Open intelligence. Built on trust between allies. Owned by the nations that need it most. The future of sovereign AI. Read more in the @WSJ.

@MishaLaskin Super exciting!

AGI is in its first stages of take-off. Every country is realizing that AI sovereignty is existential, which requires open models. We’ve signed a deal with Shinsegae Group to build South Korea’s sovereign cloud on a US open model built by Reflection. More to come.

My PhD thesis is out 🥳🎓 How do LLMs, trained on trillions of tokens, reason? Can they generalise beyond their training data or are they constrained by what they've seen before? My takeaway: they can generalise beyond training in interesting ways, showing genuine reasoning

I am looking for an intern to do a research project on RL posttraining of LLMs. If you are PhD student and would like to work with me for several months pushing the efficiency of RL systems, send me an email with the [efficient_rl_internship] subject. Friends, please, retweet.

@_ghorbani @psanfernandes @reflection_ai Excited to have you on board 🚀

@psanfernandes @reflection_ai Welcome to the team Patrick! Excited to work together 🔥🔥🔥

Excited to announce that, after finishing my PhD a couple of months ago, I will continue to do *open* science at @reflection_ai on @_ghorbani's new team! And we are still looking for exceptional individuals to join us 😉

📢 New PhD Position 📢 We (@_rockt, @borruell, and I) are looking for a PhD student to work at the intersection of open-endedness and game design. The student will be part of the @UCL_DARK lab and funded by @iconicgamesio and UCL. See this doc for a more detailed description of the research direction and candidate expectations: docs.google.com/document/d/1Z7… To apply, please complete this form by January 15: docs.google.com/forms/d/16JGfS…

Hello World: I am reviewing Phd applications and the level of talent is amazing. Sadly, the funding situation is extremely challenging. SO: If you'd like to gift someone brilliant literally the opportunity of their lifetime and sponsor their Phd in my group please let me know 🙏

@brandondamos @reflection_ai Welcome to the team Brandon!

An update: I have left Meta Superintelligence Labs and joined @reflection_ai in NYC!! Today is my first day. I started in the Fundamental AI Research (FAIR) lab at Meta, then Facebook, over six (!) years ago as my first job out of the PhD. They were some formative years. The group is full of exceptionally talented people that have profoundly shaped my perspective on life and research. I am grateful for everything we have shared and proud of everything we created together. I have decided it's time to try to build a startup and new frontier models with Reflection. Superintelligence will be one of the most significant advancements of our lifetimes, resulting in a computational reflection of ourselves. We believe it should be safe, open, and accessible to all. I am excited to be jumping into the post-training and reinforcement learning pipelines to advance capabilities and alignment. And we are hiring! Please get in touch.

Come meet some of the Reflection research team and our founders @real_ioannis and @MishaLaskin at our NeurIPS booth.

@_ghorbani @reflection_ai Excited to work together!

Hi friends, after three incredible years at OpenAI I am excited to share that I am starting a new chapter at @reflection_ai, where I will be leading the Science of Scaling team. Our mission is to deepen the scientific understanding of large scale learning and to turn compute into intelligence as efficiently and predictably as possible.

✈️ Going to San Diego for #neurips2025! Will be Mon-Sat, often at the @reflection_ai booth (we'll have a big one, with 👕swag!) Want to meet up with every old friend🙂 Ping me also to discuss: ‣ open model ecosystem ‣ AI for SWE ‣ enterprise post-training ‣ best local tacos

Headed to #NeurIPS with the Reflection team this week! 👋 Keen to chat about LLMs, RL, agents, open research & science. We have a few open roles: jobs.ashbyhq.com/reflectionai

Reflection will be at NeurIPS San Diego next week. Say hello to the team at the Reflection booth and come along to our panel on open AI ecosystems. You’ll hear from: @real_ioannis (Reflection) @joespeez (Meta, Llama & PyTorch) @natolambert (AI2, ATOM Project) @robertnishihara (Ray, Berkeley) @ying11231 (SGLang, former xAI) We’ll be discussing: What does it actually take to build open AI ecosystems? What can we learn from China's approach? What do transparency and sovereignty mean in practice? Where is frontier intelligence heading? Find the Luma link in the thread to mark it in your calendar.