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.