How to Review Code with Google Gemini on Mac
Use Google Gemini's massive context window and fast inference to review entire files or multi-file diffs in one pass. Ideal for reviewing large pull requests without splitting them up.
Why This Combination Works
Google Gemini's standout feature for code review is its enormous context window — you can feed it entire files or even multiple files at once. Gemini 2.5 Flash is also remarkably fast, returning reviews in seconds even for large inputs. This makes it perfect for reviewing complete modules rather than isolated snippets.
Recommended Model
Gemini 2.5 Flash — its speed and large context window let you review substantial code blocks quickly, making it ideal for scanning through entire files or PRs.
Example Prompt
Review this code for bugs, performance issues, and style violations. Check for proper error handling, potential memory leaks, and adherence to SOLID principles. Summarize findings by severity.
Setup Steps
Download Echoo
Install Echoo from echoo.ai and launch it from your menu bar. The app runs quietly in the background, ready whenever you need it.
Add your Google AI API key
Open Echoo settings, navigate to Providers, and paste your Google AI Studio API key. Select Gemini 2.5 Flash as your preferred model.
Set up a Code Review command
Create a custom command optimized for large reviews. Instruct Gemini to organize findings by file and severity, taking advantage of its ability to process large contexts.
Review code with a shortcut
Select code — even large blocks — and trigger your shortcut. Gemini processes the full selection and returns a structured review quickly.
Frequently Asked Questions
Yes. Gemini 2.5 Flash's large context window means you can paste several files or a full diff into your review. Echoo sends all selected text, so select across files if your editor supports it.
Gemini 2.5 Flash is one of the fastest models available. Most code reviews return in 2–5 seconds, even for substantial code blocks. This makes it great for rapid iteration.
Google offers a generous free tier for Gemini API access through AI Studio. For most individual developers doing code reviews, the free tier is sufficient for daily use.
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