Skip to main content
Mistral’s Vibe agent, run inside Palette Desktop through the vibe-acp CLI. Pick it per chat like any other agent.

​
Setup

  1. In a chat, choose Mistral Vibe as the agent. If you don’t have it yet, Palette installs it for you in one click from Settings. No terminal needed.
  2. Choose Sign in with Mistral and complete the browser flow. This provisions a Mistral La Plateforme API key and stores it locally.
That’s it. See below for what the sign-in actually sets up, because it is not what most people expect.

​
Models

You can set any of them as your default and switch per chat. Devstral Small is no longer available. Chats that used it now run Mistral Large. When you resume a chat, Vibe runs the model selected in that chat’s tab, even if the session last ran a different one. For more on Mistral’s models, see Mistral’s model overview.

​
Permission modes

Mistral Vibe offers three permission modes. Pick one per chat, or set the default in Settings. Mistral Vibe doesn’t offer Plan mode. Chats that used Plan now use a mode Vibe supports, and never a broader one than you picked. If your installed version of Vibe doesn’t offer the mode you picked, the chat falls back to asking before each action. Palette shows a notice in the chat when this happens.

​
Usage & billing

“Sign in with Mistral” is not a consumer Le Chat subscription. It provisions a Mistral La Plateforme API key and stores it in ~/.vibe/.env as MISTRAL_API_KEY. Mistral Vibe owns this local credential; Palette does not copy it into your operating system’s keychain. Access is metered by tokens and billed to your own Mistral La Plateforme account. To raise limits or manage payment, use your Mistral account. Palette does not add a markup on Mistral usage.

​
Limits & notes

  • Palette Desktop does not currently guarantee that Mistral loads AGENTS.md automatically. Mention the file in your prompt when Mistral should use those workspace instructions. See Working with CLAUDE.md and AGENTS.md.
  • Plan mode is available with Claude Code and the Palette agent. Slash commands are specific to Claude Code. Neither is available for Mistral.

​
FAQ

​
Is “Sign in with Mistral” a subscription?

No. It is not a consumer Le Chat subscription. It provisions a Mistral La Plateforme API key, and usage is metered and billed to your own Mistral account.

​
Where is my key stored?

Mistral Vibe stores it on your machine in ~/.vibe/.env as MISTRAL_API_KEY. Palette does not copy it into your operating system’s keychain.

​
Which models are available?

Mistral Large (the default and most capable), Mistral Medium, and Mistral Small (lighter and faster). Devstral Small is retired, and chats that used it now run Mistral Large.
  • Agents, all five agents and how model access works.
  • Chats, pick an agent per chat.
  • Quick Start, install and run your first session.