Baptiste Rozière
First author of Code Llama and co-author of LLaMA and Llama 3; later an author on Mistral AI model papers
Meta's AI people page describes Baptiste Rozière as a research scientist at Meta AI in the code generation team, working on large language models with a special interest in code, who contributed to Llama and started Code Llama. Rozière is first author of Code Llama: Open Foundation Models for Code (2023), a family of code models based on Llama 2 released under a permissive license for research and commercial use, and a co-author of LLaMA (2023) and Llama 3 (2024), where Rozière is listed among the core contributors. Earlier work includes unsupervised translation between programming languages (2020). Rozière is also listed among the core contributors of Devstral (2025), a paper from Mistral AI and All Hands AI, and among the contributors of Mistral AI's Ministral 3 (2026).1234567
Work
LLaMA and Llama 3Open weights
Co-author of LLaMA: Open and Efficient Foundation Language Models (2023) and listed among the core contributors of The Llama 3 Herd of Models (2024); Meta's people page says Rozière contributed to Llama.341
Code Llama (external site: arxiv.org)Open weights
First author and core contributor of Code Llama: Open Foundation Models for Code (2023), a family of code models based on Llama 2 in 7B, 13B, 34B, and 70B sizes that the abstract says is released under a permissive license allowing research and commercial use; Meta's people page says Rozière started Code Llama.21
Unsupervised translation of programming languages (external site: arxiv.org)Published research
Co-author of Unsupervised Translation of Programming Languages (2020), which trains a fully unsupervised neural transcompiler between C++, Java, and Python and releases a test set of parallel functions with unit tests.5
Mistral AI model papers (external site: arxiv.org)Open weights
Listed among the core contributors of Devstral (2025), a Mistral AI and All Hands AI paper, and among the contributors of Ministral 3 (2026); the Ministral 3 abstract says the 3B, 8B, and 14B models are released under the Apache 2.0 license.67
Other documented roles
Roles the sources document but that are not confirmed as current.
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