Cassiopeia – Multi-AI Chat Integration for Minecraft

Cassiopeia is a client-side Fabric mod that integrates multiple AI models into the Minecraft chat system. Players can send prompts to their chosen AI directly in-game and receive real-time responses.

Features

• Multi-AI Support: Choose between Gemini 2.5 Flash, GPT-5, Grok, and Claude 3 Sonnet.
• Game State Integration: AI can see what item your holding and armour your wearing and more
• Local Storage: API keys, prompts, and history are stored locally — never shared with anyone except your selected AI provider.
• Conversation Memory: Remembers your last 5 exchanges for conversational consistency.

Usage

/ai

— Shows all available commands and usage info in-game.

/ai <prompt>

— Send a prompt to the currently configured AI model.

/ai api <model> <key>

— Save your API key for a model (Gemini, OpenAI, grok, Claude).

/ai model <name>

— Switch to a different AI model.

/ai clear

— Clear stored conversation history.

Get Your API Keys

• Gemini API Key (Google) (free with a Google account)
• OpenAI API Key (GPT-5)
• xAI API Key (Grok))
• Anthropic API Key (Claude 3)

Community

For support, suggestions, and early info on new updates, join our Discord server.