Mistral AI releases Le Chaton Fat model and Vibe Agent product

Mistral AI announced Le Chaton Fat, a model that achieved top score on a web development benchmark, and unveiled Vibe Agent, according to Mistral's official announcement and Hacker News discussion. CEO Arthur Mensch teased a larger model family coming soon. The announcements signal Mistral's expansion in agentic coding tools as the ecosystem adds competitors to established platforms.