Simon Willison 12/9/2025

mistralai/mistral-vibe

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This article provides a technical overview of Mistral AI's newly released, Apache 2.0 licensed 'Vibe' CLI coding agent. It examines the Python-based implementation, its use of Pydantic and Rich/Textual, and compares it to other agents like Gemini CLI and Claude Code. The piece highlights the well-structured source code, the extraction of key prompts into Markdown files, and includes a practical test where the agent was used to build a Space Invaders game with three.js.

mistralai/mistral-vibe

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