Gemini: Google AI Assistant for Claude Code

DEFAULT MODEL: Gemini 3.1 Pro

The default model for ALL Gemini invocations is gemini-3.1-pro-preview.

• Always use gemini-3.1-pro-preview unless user explicitly requests another model
• This is the highest reasoning model available (released Feb 19, 2026)
• CLI default (without -m) is gemini-3-flash-preview (fast but less capable)
• Fallback chain: gemini-3.1-pro-preview → gemini-3-pro-preview → gemini-2.5-flash

# Default invocation - ALWAYS use gemini-3.1-pro-preview
gemini -m gemini-3.1-pro-preview "your prompt here"