Arthur Mensch

Arthur Mensch was born on 17 July 1992 in Sèvres, and raised in Ville-d'Avray in the Hauts-de-Seine department near Paris. He is the son of a businessman father and a physics teacher mother. He studied at the École Polytechnique (2011) and Télécom Paris, then completed the Mathematics, Vision, Learning (MVA) master's program at the École normale supérieure Paris-Saclay. From 2015 to 2018, he was a PhD student at Inria / NeuroSpin (CEA, Saclay), supervised by Bertrand Thirion, Gaël Varoquaux and Julien Mairal, on predictive models and stochastic optimization for large-scale functional MRI analysis. From 2018 to 2020, he was a postdoctoral researcher at the ENS, working on optimal transport and stochastic optimization. He also spent several months at NYU's Courant Institute of Mathematical Sciences with Joan Bruna, focusing on multi-agent reinforcement learning.

In late 2020, Mensch joined DeepMind Paris, where he worked for nearly three years on large language models (LLMs), multimodal systems, and retrieval-augmented architectures. He left in May 2023 to co-found Mistral AI.

Mensch keeps his private life largely confidential; some reports mention he became a father in 2024.