DIRECT SUMMARY // KEY TAKEAWAY
From open-source status to model flexibility, these three tools exhibit significant differences in product philosophy.
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.