Antigravity CLI vs Claude Code: Which AI Coding Agent Should You Use in 2026?
What’s the Core Difference?
Antigravity CLI is the free generalist. Claude Code is the paid specialist.
| Antigravity CLI (agy) | Claude Code | |
|---|---|---|
| Company | Anthropic | |
| Price | Free (with quota limits) | $20/month+ (Pro) |
| Default model | Gemini 3.5 Flash | Claude Sonnet 4.6 |
| Best model | Gemini 3.5 Ultra | Claude Opus 4.7 |
| Context window | 1M tokens | 200K tokens |
| SWE-bench score | Not published | 80.9% (highest) |
| Multi-agent | Native parallel subagents | Supported (via Hooks) |
| MCP support | Yes | Yes |
| Install | One-line curl | One-line curl |
| Open source | No | No |
When to Use Antigravity CLI?
Daily development, quick questions, code explanations. Gemini 3.5 Flash is fast and the 1M token context can swallow an entire codebase.
Good for:
- Quick API questions
- Explaining unfamiliar code
- Simple refactoring (rename, extract function)
- Writing tests and docs
- Tasks that need search or browser (built-in Chrome agent)
curl -fsSL https://antigravity.google/cli/install.sh | bash
cd your-project && agyWhen to Use Claude Code?
Complex multi-file refactoring and deep reasoning tasks. Claude Opus 4.7 has the strongest code comprehension — especially when you need it to understand 20+ files before making changes.
Good for:
- Large-scale architecture refactors
- Complex bug hunts
- Cross-file changes requiring deep understanding
- Code review
- Business logic with strict correctness requirements
curl -fsSL https://claude.ai/install.sh | bash
cd your-project && claudeHow Much Does Each Cost?
| Usage Level | Antigravity CLI | Claude Code |
|---|---|---|
| Light (1-2 hrs/day) | $0 | ~$20/month (Pro) |
| Moderate (4-5 hrs/day) | $0 (may hit throttling) | ~$20-50/month |
| Heavy (all day) | $20/month (AI Pro) | ~$100-200/month (Max) |
Antigravity’s free tier works for most individual developers. But Gemini 3.5 Flash consumes significantly more tokens than older models — community reports suggest 3-5x increase for similar tasks.
Claude Code Pro has per-window usage limits. The Max tier ($100-200/month) is effectively unlimited.
Can You Use Both Together?
Yes, and it’s the recommended 2026 workflow:
- Daily tasks: Antigravity CLI (free, fast)
- Hard problems: Claude Code (more accurate)
Both tools’ project config files coexist:
AGENTS.md— read by Antigravity CLICLAUDE.md— read by Claude Code
Put both in your project root. Each tool follows its own rules when active.
Strengths and Weaknesses
Antigravity CLI
✅ Free tier
✅ Fast (Go binary + Flash model)
✅ 1M token context fits large projects
✅ Built-in browser agent for testing
✅ Parallel subagents for multi-task work
❌ Weaker deep reasoning than Claude
❌ High token consumption, free tier can throttle
❌ WSL auth issues (needs gnome-keyring)
❌ Ecosystem still maturing
Claude Code
✅ Best coding benchmark scores
✅ Flexible Hooks system (auto-lint, auto-test)
✅ Mature CLAUDE.md ecosystem
✅ Consistent output quality
❌ Costs $20/month minimum
❌ Smaller context window (200K vs 1M)
❌ Pro tier throttles on heavy use
❌ Same VPN requirement as Antigravity
How to Choose?
Zero budget + daily use → Antigravity CLI
Code quality is priority → Claude Code
Have budget → Use both, switch by task complexityDon’t overthink it. Install both, run real tasks for a day, and keep whichever fits your workflow. Most serious devs in 2026 use two tools.