georgekhananaev Gemini CLI
Interact w/ Google's Gemini CLI locally. Run queries, get responses, compare outputs.
Prerequisites
Gemini CLI must be installed & configured:
- Install: https://github.com/google-gemini/gemini-cli
- Auth: Run
gemini& sign in w/ Google account - Verify:
gemini --version
When to Use
- User asks to "run/ask/use gemini"
- Compare Claude vs Gemini responses
- Get second AI opinion
- Delegate task to Gemini
Usage
IMPORTANT: Use -p flag for non-interactive (headless) one-shot queries. Without -p, gemini opens interactive mode which hangs in automation.
# One-shot query (MUST use -p for non-interactive)
gemini -p "Your prompt"
# Specific model
gemini -p "prompt" -m gemini-3-pro
# JSON output
gemini -p "prompt" -o json
# Auto-approve tool use (-y is deprecated)
gemini --approval-mode=yolo -p "prompt"
# File analysis
cat file.txt | gemini -p "Analyze this"
Models
| Alias | Use case |
|---|---|
auto |
DEFAULT — routes per prompt (simple → Flash, complex → 3 Pro) |
pro |
Force Gemini 3 Pro (best all-round) |
flash / flash-lite |
Fast, lightweight tasks (3.5 Flash GA rolling out as auto default) |
Omit -m to use auto routing. Aliases beat pinned model ids — they track
upstream model swaps. Pin a full id (e.g. gemini-3-pro) only when the user
names one.
CLI Options
| Flag | Desc |
|---|---|
-p |
Required for headless. Non-interactive prompt |
-m |
Model selection |
-o |
Output: text/json/stream-json |
--approval-mode=yolo |
Auto-approve all actions (-y is deprecated) |
-d |
Debug mode |
-s |
Sandbox mode |
-r |
Resume session |
-i |
Execute prompt then continue interactive |
Comparison Workflow
- Provide Claude's response first
- Run same query via
gemini -p "prompt" - Present both for comparison
Best Practices
- Always use
-pfor automation/one-shot queries - Quote prompts w/ double quotes
- Use
-o jsonfor parsing - Pipe files for context