As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/person/julien-chaumond/

# Julien Chaumond

Co-founder and CTO, Hugging Face (as of 2026-10-29; source: https://x.com/julien_c).

Co-founder and CTO of Hugging Face, the main hub for open-weight models; linked the Mistral Large 4 weights page at launch (Oct 2026).

## Accounts

- X: https://x.com/julien_c

## In the news (1 event, newest first)

- 2026-10-06: [Mistral releases Mistral Large 4 ("le Chonk")](https://postcutoff.com/e/2026-10-06-mistral-large-4/), Model releases. It is the first trillion-parameter open-weight model from a European lab, and it is trained on European compute.

## Posts (1)

- 2026-10-06: [Julien Chaumond (Hugging Face): "WE ARE SO BACK", links the Mistral Large 4 weights page](https://postcutoff.com/p/2026-10-06-julien-c-mistral-large-4-weights/), Julien Chaumond (@julien_c), X. Hugging Face's co-founder and CTO links the upcoming-release page for the ML4 weights (~16k views by 7 Oct).

## Videos (1)

- 2026-05-02: [Claude Mythos Explained: Anthropic’s Most Dangerous Model Yet](https://postcutoff.com/v/yt-theaigrid-claude-mythos-explained-anthropic-s-most/), TheAIGRID, YouTube, review, 17,778 views as of 7 October 2026.

Profile checked 2026-10-29.