Mehdi Fatemi (@mefatemi) 's Twitter Profile
Mehdi Fatemi

@mefatemi

Researcher and Team Lead | Reinforcement Learning and Sequential Reasoning | views are personal

ID: 47680950

linkhttps://www.linkedin.com/in/fatemi calendar_today16-06-2009 17:19:15

1,1K Tweet

437 Followers

563 Following

Justin Bauer (@realjustinbauer) 's Twitter Profile Photo

Our paper “Learning from Less: Measuring the Effectiveness of RLVR in Low Data and Compute Regimes” was accepted to #MLSys 2026! We introduce three procedurally generated, verifiable datasets—Counting, Graph, and Spatial Reasoning—to study RLVR under low-data / low-compute

The Wall Street Journal (@wsj) 's Twitter Profile Photo

As the scale of Iran’s crackdown comes into view, so too does an expanding list of teenagers and other young people killed in the regime’s brutal response to recent protests on.wsj.com/4rpPKRO

vincent sunn chen (@vincentsunnchen) 's Twitter Profile Photo

Our ability to measure AI has been outpaced by our ability to develop it, and this evaluation gap is one of the most important problems in AI. Today we're launching Open Benchmarks Grants — a $3M commitment to fund open benchmarks for frontier AI and close the evaluation gap.

Alex Ratner (@ajratner) 's Twitter Profile Photo

Our ability to measure AI has been outpaced by our ability to develop it. This evaluation gap is one of the most critical problems in AI. Today, we’re excited to announce the Open Benchmarks Grants - with a starting $3M commitment from @Snorkel + support from @HuggingFace

Reza Pahlavi (@pahlavireza) 's Twitter Profile Photo

هم‌میهنانم، علی خامنه‌ای، ضحاک خونخوار زمان، قاتل ده‌ها هزار تن از شجاع‌ترین فرزندان ایران از صفحه روزگار محو شد. با مرگ او، جمهوری اسلامی نیز در عمل به پایان خود رسیده است و به‌زودی زود به زباله‌دان تاریخ خواهد پیوست. هر تلاشی از سوی بقایای رژیم برای تعیین جانشین خامنه‌ای، از

Reza Pahlavi (@pahlavireza) 's Twitter Profile Photo

My fellow compatriots, Ali Khamenei, the bloodthirsty despot of our time, the murderer of tens of thousands of Iran’s bravest sons and daughters, has been erased from the face of history. With his death, the Islamic Republic has in effect reached its end and will very soon be

Alex Ratner (@ajratner) 's Twitter Profile Photo

We are hiring for a ton of roles on our #Research team Snorkel AI - if interested please reply/reach out! As one of the first academic teams to focus on AI data development back at Stanford AI Lab / University of Washington - we have long believed this is one of *the* most exciting areas to be as a

Armin (@arminpcm) 's Twitter Profile Photo

We're hiring a Senior Manager, #Research at Snorkel AI . You'd own the critical bridge between research breakthroughs and real products — turning prototypes into production. If you thrive at the intersection of research and engineering, we want to talk. Apply here:

Armin (@arminpcm) 's Twitter Profile Photo

Scaling RL training for agentic models is one of the hardest infra problems in ML right now and honestly, one of the most exciting jobs🔥 Our research team Snorkel AI is deep in RLFT (data valuation, curriculum learning, and more). We're #hiring an ML Training Infra engineer

Armin (@arminpcm) 's Twitter Profile Photo

Exciting time Snorkel AI! If you have industry experience with post-training #RLFT on #LLMs (100B+ models), feel free to drop a comment or apply through the link in the thread. #hiring #reinforcement_learning

Reza Pahlavi (@pahlavireza) 's Twitter Profile Photo

به سرداران سپاه پاسداران انقلاب اسلامی! امروز کمتر کسی تردید دارد که از نظام ولایت فقیه جز جسمی نیمه‌جان باقی نمانده است، و تصمیم‌گیران واقعی این ساختمان در حال ریزش، در نتیجه پنج دهه ماجراجویی و جنایت، شمایید. سیاست‌های غلط منطقه‌ای و دیوانگی‌های آخرالزمانی شما، ایران را به

Reza Pahlavi (@pahlavireza) 's Twitter Profile Photo

To the Commanders of the Islamic Revolutionary Guard Corps (IRGC): Today, few doubt that little remains of the Velayat-e Faqih dictatorship but a half-dead body. As a result of five decades of warmongering and crimes, you are the real decision-makers of this collapsing system.

To the Commanders of the Islamic Revolutionary Guard Corps (IRGC): 

Today, few doubt that little remains of the Velayat-e Faqih dictatorship but a half-dead body. As a result of five decades of warmongering and crimes, you are the real decision-makers of this collapsing system.
پسرک (@pesarack) 's Twitter Profile Photo

یه چیز دیگه که از شدت وضوح ممکنه دیده نشه اینه که اگه قرار باشه همه‌ی کشورها شبیه به رژیم خونخوار اشغالگر ایران بجنگن، اساسا هر کشوری می‌تونه با آمریکا بجنگه. اینکه هنر نیست که هست و نیستِ نود میلیون نفر رو بذاری وسط و بری پشتش قایم بشی و شروع کنی به سنگ زدن به خونه و هتل و

Armin (@arminpcm) 's Twitter Profile Photo

Your eval rubric might be the weakest link in your entire training pipeline and you'd never know it. We cataloged 8 failure modes across reliability, validity, and downstream impact along with automated diagnostics to catch them. Read our latest paper RIFT for more details:

Armin (@arminpcm) 's Twitter Profile Photo

Web agents are getting increasingly capable. Excited that our team Snorkel AI partnered with Ai2 on MolmoWeb where we managed the human trajectory annotations, verified correctness, and ensured quality control for the training data. Blog: allenai.org/blog/molmoweb

Web agents are getting increasingly capable. Excited that our team <a href="/SnorkelAI/">Snorkel AI</a> partnered with <a href="/allen_ai/">Ai2</a> on MolmoWeb where we managed the human trajectory annotations, verified correctness, and ensured quality control for the training data.
Blog: allenai.org/blog/molmoweb
Neil Stone (@drneilstone) 's Twitter Profile Photo

Everyone is talking about uranium enrichment, oil prices, and the Strait of Hormuz. No one is talking about the Iranian people

Justin Bauer (@realjustinbauer) 's Twitter Profile Photo

Our #MLSys2026 paper is live on arXiv 📄 We ran a systematic study of RLVR in low-data regimes across 3 procedurally generated benchmarks (counting, graph, spatial reasoning). Key finding: dataset composition matters more than dataset size. arxiv.org/abs/2604.18381

Armin (@arminpcm) 's Twitter Profile Photo

Exciting release! And we are looking for researchers with deep RL and LLM post-training expertise to help us build something amazing! #hiring #rl #post_training