100 Hours Testing Claude Code vs Antigravity (honest results)

TL;DR

Claude Code wins on code quality and planning while Antigravity excels at UI design and speed, making each tool better for different tasks.

Key Points

• 1.Claude Code and Antigravity are fundamentally different environments. Claude Code is a terminal-first CLI tool that fits into your existing editor, while Antigravity is a standalone VS Code-based IDE with a built-in visual agent manager and browser agent.
• 2.Benchmark scores are close but favor Claude Code. On SWE-bench verified, Claude Opus 4.6 inside Claude Code scored 80.9% versus Gemini 3 Pro inside Antigravity at 76.2%, though Google hasn't published identical methodology.
• 3.Real-world productivity gains are strong for both tools. Anthropic's team reported 50% productivity gains and 67% more pull requests per engineer; an independent 21-day Antigravity test showed 60–70% faster development across 12 projects.
• 4.Test 1 (habit tracker app): split results. Claude Code produced better logic and user experience structure; Antigravity produced a more polished, visually appealing design — a pattern that repeated across all three live tests.
• 5.Test 2 (PDF research report): Claude Code won clearly. It produced a styled report with cited sources (ICIC, LinkedIn Economic Graph), while Antigravity skipped asking clarifying questions and delivered an unstyled report without citations.
• 6.Test 3 (landing page): Antigravity's design dominated. Antigravity generated a page with animations, floating elements, and visual depth from a single prompt; Claude Code's output was functional but visibly 'vibe-coded' with less polish.
• 7.Pricing and reliability differ meaningfully. Claude Code costs $20–$200/month with faster shipping (6 major features in Q1 2026 alone); Antigravity is free to $250/month but remains in public preview with login bugs, agent loops, and inconsistent rate limits.