Hola! I’m Oscar Mañas, a Research Scientist at Meta in Zurich, working on multimodal and embodied AI. I received my PhD from Mila and Université de Montréal, where I was advised by Prof. Aishwarya Agrawal. I’ve also been a Visiting Researcher at Meta FAIR and a Research Intern at Element AI, and my work has been published at CVPR, ICML, ICCV, AAAI, EACL, and TMLR. See my CV for more details.

Research

We experience the world through many channels: we take it in through sight and touch, act on it with our bodies, and use language both ways. Each is a different view of the same underlying reality. I build multimodal models that learn from these views to understand the world, generate it, and act in it. My work has followed that path: from vision-language models and image and video generation, along with the reward models and metrics that evaluate and steer them, to video world models, and now to embodied and physical AI with vision-language-action models (VLAs) and world-action models (WAMs). Once actions are just another modality, what a model learns from watching the world can carry over to acting in it, and from there to improving itself through its own experience.

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Selected Publications

LatentLens: Revealing Highly Interpretable Visual Tokens in LLMs

Benno Krojer, Shravan Nayak, Oscar Mañas, Vaibhav Adlakha, Desmond Elliott, Siva Reddy, Marius Mosbach ICML 2026 Paper Code

Controlling Multimodal LLMs via Reward-guided Decoding

Oscar Mañas, Pierluca D'Oro, Koustuv Sinha, Adriana Romero-Soriano, Michal Drozdzal, Aishwarya Agrawal ICCV 2025 First author Paper

Learning What Matters: Prioritized Concept Learning via Relative Error-driven Sample Selection

Shivam Chandhok, Qian Yang, Oscar Mañas, Kanishk Jain, Leonid Sigal, Aishwarya Agrawal CVPR 2026 Paper

EvalGIM: A Library for Evaluating Generative Image Models

Melissa Hall, Oscar Mañas, Reyhane Askari Hemmat, Mark Ibrahim, Candace Ross, Pietro Astolfi, Tariq Berrada Ifriqi, Marton Havasi, Yohann Benchetrit, Karen Ullrich, Carolina Braga, Abhishek Charnalia, Maeve Ryan, Mike Rabbat, Michal Drozdzal, Jakob Verbeek, Adriana Romero-Soriano arXiv 2024 Paper Code

Consistency-Diversity-Realism Pareto Fronts of Conditional Image Generative Models

Pietro Astolfi, Marlene Careil, Melissa Hall, Oscar Mañas, Matthew Muckley, Jakob Verbeek, Adriana Romero-Soriano, Michal Drozdzal arXiv 2024 Paper

Improving Text-to-Image Consistency via Automatic Prompt Optimization

Oscar Mañas, Pietro Astolfi, Melissa Hall, Candace Ross, Jack Urbanek, Adina Williams, Aishwarya Agrawal, Adriana Romero-Soriano, Michal Drozdzal TMLR 2024 First author Paper

Improving Automatic VQA Evaluation Using Large Language Models

Oscar Mañas, Benno Krojer, Aishwarya Agrawal AAAI 2024 First author Paper Code

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