There is no "best" tool, only the tool best suited for the scenario. Use the following table for a quick self-test:
🚀 Selection Matrix
| Your Needs | Recommended Tool | Reason |
|---|---|---|
| Maximum Security & Compliance | Claude Code | Powerful Hook system can enforce Lint/Test review. |
| Open Source Fan, Want Deep Customization | Gemini CLI | The only open-source option; fork the source and customize. |
| Multi-model usage, Avoid Vendor Lock-in | Antigravity | Native support for one-click switching between Gemini/Claude/GPT. |
| Heavy Frontend/UI Development & Debugging | Antigravity | Built-in visual browser Agent provides an unbeatable debugging experience. |
| Need CI/CD Automated Batch Processing | Gemini CLI / Claude Code | Excellent CLI support (-p mode), ideal for unattended tasks. |
| Budget-Sensitive, Small Personal Projects | Gemini CLI | Most generous free tier; flexible billing via Vertex AI. |
| Enterprise-level Complex Workflow Orchestration | Claude Code | Mature Plugin/Skill ecosystem; controlled and rigorous processes. |
| Unfamiliar with Terminal, Prefer GUI Interaction | Antigravity | Experience closest to a traditional IDE with a gentle learning curve. |
Summary: The One-Liner Guide
- Use Claude Code if you are a hardcore developer seeking "programmable, controlled" power.
- Use Gemini CLI if you need flexibility, open-source transparency, or are building a customized Agent tool for an enterprise.
- Use Antigravity if you want the strongest visual presentation, cross-model capabilities, and ultimate UI development efficiency.
Since the configurations for these three tools (.claude/, .gemini/, .agents/) do not conflict, you can even install all of them in the same project and let them "each show their strengths" for different tasks.