Beneath the "Consensus Layer," each tool begins to show its unique personality. First, let's look at the two most intuitive dimensions: form factor and model support.
1. Form Factor and Pricing
| Dimension |
Claude Code |
Gemini CLI |
Antigravity |
| Form Factor |
CLI + IDE Plugin |
Pure CLI |
Full IDE + Web |
| Open Source |
❌ Closed Source |
✅ Open Source (Apache 2.0) |
❌ Closed Source |
| Pricing |
Subscription ($20 - $200) |
Free tier + Pay-as-you-go |
Currently free during preview |
| Audience |
Power users & teams |
OS fans, corporate customization |
Visualization & multi-agent fans |
- Gemini CLI is the only open-source option. This means enterprises can fork its source code and deeply integrate it into internal publishing systems or security audit processes.
2. Model Support (Flexibility)
| Dimension |
Claude Code |
Gemini CLI |
Antigravity |
| Default Model |
Claude 4.x Series |
Gemini Series |
Gemini 3 |
| Multi-Vendor |
❌ Claude Series only |
❌ Gemini Series only |
✅ Supports Gemini + Claude + GPT |
| Context Window |
200K / 1M (Opus 4.7) |
1M+ Native |
Follows chosen model |
- Antigravity's Killer Feature: It allows you to switch the underlying model at any time within the same IDE window. You can have Gemini handle large-scale code refactoring (leveraging its massive context) and Claude handle fine-grained bug fixes (leveraging its coding logic).
💡 Selection Advice
- If you need private deployment or have auditing requirements for the underlying code, Gemini CLI is the top choice.
- If you are a loyal Anthropic user seeking the smoothest terminal experience, Claude Code will not disappoint.
- If you want to avoid vendor lock-in and need an intuitive graphical interface, Antigravity offers the best balance.