Claude Code vs Google Antigravity: 100+ Hours of Testing, Honest Results

If you’re trying to choose between Claude Code and Google Antigravity for AI-powered development, the answer isn’t as simple as “one is better.” After extensive testing, the reality is that each tool excels at different jobs—and one is a much better long‑term skill to invest in.

This guide breaks down how both platforms work, how they differ in practice, and what the live side‑by‑side tests revealed so you can pick the right tool for your workflow.

Claude Code vs Antigravity: What They Actually Are

Both Claude Code and Antigravity are agentic coding platforms. That means they don’t just autocomplete lines of code—they can:

• Take a high‑level mission ("build a habit tracker app")
• Break it into a multi‑step plan
• Spin up sub‑agents to work in parallel
• Read and modify files and folders
• Run terminal commands
• Execute changes across your entire codebase

The big difference is where this power lives and how you interact with it.

Claude Code is terminal‑first. It’s a CLI tool that plugs into the environment you already use—your editor, your keybindings, your extensions. You can:

• Run it from any terminal via an npm install
• Use a VS Code extension with inline diffs, plan review, and file visibility
• Use a desktop app or a browser version if you don’t want VS Code

The CLI is the most feature‑complete, but the VS Code extension covers almost everything most people need.

Antigravity is a standalone IDE, likely based on a VS Code fork. You open a separate app with:

• A manager view to watch multiple agents working across different workspaces
• A built‑in browser agent that can navigate real web pages
• Support for extensions and familiar shortcuts, but inside its own environment

In short:

• Claude Code gives you powerful primitives inside your existing setup.
• Antigravity gives you a purpose‑built AI IDE you move into.

Models, Planning, and Code Quality

Both tools are just harnesses around large language models. You don’t pay for the tool itself—you pay for the model usage (tokens).

• Claude Code defaults to Anthropic’s Claude models (e.g., Opus 4.6).
• Antigravity defaults to Google’s Gemini models (e.g., Gemini 3 Pro).

Swapping models is possible in both, but may require some configuration. The harness shapes the workflow; the model sets the ceiling.

Planning and Reasoning

Claude Code’s biggest strength is how well it thinks before it acts. It has a dedicated planning mode that:

• Maps out multi‑file changes before touching any code
• Stays read‑only while planning (strategy first, edits later)
• Lets you control reasoning depth up to Anthropic’s “Ultra Think” for complex work

Antigravity also has a plan mode, but in side‑by‑side use, Claude Code’s planning is generally more thoughtful and structured—especially on multi‑file or architecture‑level tasks.

Both tools let you set project‑level rules and custom instructions that persist across sessions, and both support plugins, custom commands, and external integrations. However, Claude Code tends to feel more “hackable” and configurable at a project level.

Understanding Existing Codebases

Claude Code is particularly strong at working inside existing projects. It:

• Reads your full project structure
• Picks up naming conventions and patterns
• Generates code that fits your architecture instead of bolting on random files

Antigravity can also work across projects, but its standout use case is different.

Antigravity’s Strength: From‑Scratch Apps and UI

Antigravity shines when you’re building apps and front‑ends from scratch. In an independent 21‑day test across 12 real projects, it reportedly:

• Produced clean code in 94% of cases (passing linting with no style errors)
• Completed ~73% of tasks with no human intervention
• Cut development time by 60–70%

In hands‑on use, Antigravity tends to have better visual taste for UI/UX—websites, dashboards, and web apps often look more polished out of the box than what you get from Claude Code with the same level of prompting.

The trade‑off: on longer projects, Antigravity can drift away from your original rules and conventions over a few days—a behavior Google’s own developer forums have documented. This drift is a general problem for many coding agents, but it’s noticeable here.

Benchmarks, Speed, and Reliability

Benchmark Scores

On SWE‑Bench Verified, a leading benchmark that uses real GitHub issues from real open‑source projects:

• Claude Opus 4.6 in Claude Code: ~80.9% resolution rate
• Gemini 3 Pro in Antigravity: ~76.2% resolution rate

These scores include both the tool harness and the model. Google hasn’t fully detailed its testing methodology, so it’s not a perfect apples‑to‑apples comparison—but at the top tier, they’re quite close on paper.

Real‑World Productivity

Reported productivity gains are significant on both sides:

• Anthropic’s internal engineering team saw ~50% productivity gains and 67% more merged PRs per engineer per day using Claude Code.
• An independent Antigravity test reported 60–70% faster development.

These aren’t controlled scientific studies, but they clearly show that both tools can make developers dramatically faster.

Speed and Token Costs

Task speed varies by setup, but in one representative test:

• Claude Code completed a task in ~4 minutes
• Antigravity took ~8 minutes

Interestingly, in hands‑on use, Gemini inside Antigravity often feels faster, especially for UI‑heavy tasks and quick builds.

Token costs and limits are a real concern with both tools:

• Claude Code had a caching bug in March 2026 that inflated token usage by 10–20x for some Max users, draining sessions in under two hours. Anthropic has acknowledged and worked on optimization.
• Antigravity is tied to Google’s quota system, which has been inconsistent—some Pro users report getting locked out for a week after hitting limits, and the credit system isn’t always clearly explained.

Whichever tool you use, learning to manage context and tokens is now a core developer skill. If you’re just getting started with Claude’s ecosystem, a good companion read is the full Claude beginner tutorial that walks from first prompt to Claude Code.

Stability and Maturity

On reliability, maturity matters:

• Claude Code is a production release with multiple updates shipping per week. In Q1 2026 alone, it shipped six major platform features and sometimes three releases in five days.
• Antigravity is still in public preview (as of April 2026). It’s improving quickly but still has preview‑stage issues: login problems for some users, occasional Windows bugs, and agents getting stuck in loops.

Both suffer from context loss on very long sessions. Even with Claude’s 1M‑token context window, lots of tool calls and 40+ back‑and‑forth prompts can cause earlier instructions to fade. Antigravity’s own docs recommend starting a new chat once responses slow past 10 seconds.

Best practice for both: keep sessions focused, one major task per session, and start fresh often. Claude Code also offers a compact command to compress conversation history.

Integrations and MCP Support

A coding agent is only as useful as what it can connect to. Both Claude Code and Antigravity support MCP (Model Context Protocol), an open standard that lets AI tools plug into external services like:

• GitHub and other repos
• Databases and Supabase
• Playwright, Firecrawl, monitoring tools
• Design tools and internal APIs

There are now well over 1,500 MCP servers available.

The difference is setup:

• Claude Code uses CLI‑driven MCP integration. You can add servers via a single command, by asking Claude to configure them, or by editing a JSON config (globally, per project, or per user).
• Antigravity offers a visual MCP panel that feels more like a marketplace—you can browse and click‑to‑install. It’s more beginner‑friendly, though advanced setups still involve editing a config file.

Both tools also have direct terminal access, which is huge. If something has a CLI—Git, npm, Docker, Playwright, Google Workspace—you can let the agent use it. You can even run Claude Code’s CLI inside Antigravity’s terminal if you really want both in one environment.

Pricing and Plans

Neither Claude Code nor Antigravity charges for the tool itself—you pay for the underlying AI usage.

Claude Code Pricing

Claude Code requires access to Claude models via:

• Claude Pro – $20/month: entry‑level subscription, suitable for light to moderate use.
• Claude Max – $100/month or $200/month: 5x or 20x Pro usage, aimed at heavy builders.

You can also:

• Use your own API key (which may be more expensive at scale).
• Plug in open‑source or cheaper models—but you lose much of the value of top‑tier models like Opus.

If you’re just getting started with setup, there’s a detailed walkthrough in this step‑by‑step Claude Code setup guide.

Antigravity & Google AI Pricing

Antigravity is tied to Google’s AI subscription tiers:

• Free tier: basic access with weekly rate limits; includes Gemini 3 Pro, unlimited code completions, and all features, but it runs out quickly for real work.
• Google AI Pro – $20/month: higher rate limits that refresh every 5 hours, 2 TB of Google storage, and $10/month in Google Cloud credits.
• Google AI Ultra – $250/month: highest rate limits.

One important nuance: some users report that even on Pro, usage of non‑Gemini premium models (like Claude Opus inside Antigravity) is heavily restricted—sometimes to a single session before hitting limits.

At the high end, Claude Max ($200) and Google AI Ultra ($250) are in a similar price band. For the amount of output you can get, both are far cheaper than hiring equivalent human development time.

Live Tests: How They Compare in Practice

Test 1: Full‑Stack Habit Tracker App

Prompt: build a full‑stack habit tracker with a dashboard showing streaks, a calendar heatmap, and the ability to add, edit, and delete habits. No special skills or advanced configurations were used to keep things fair.

Results:

• Claude Code produced a working habit tracker with a calendar, streaks, and CRUD functionality. The design looked “vibe‑coded” but functional.
• Antigravity initially had a blank page due to an issue, then fixed itself and produced a more visually appealing UI with a clean layout and nice interactions.

Verdict: Claude Code had better logic and user flow; Antigravity had better design.

Test 2: AI Trends PDF Report

Prompt: research AI trends in the small and medium‑sized business market and create a PDF report (max three pages) with a holistic breakdown.

Antigravity:

• Finished first and generated a PDF with sections like executive summary, adoption trends, ROI, and implementation advice.
• Did not ask clarifying questions.
• Did not cite any sources.

Claude Code:

• Took slightly longer but produced a more polished, styled PDF with clear headings, colors, and tables.
• Included a note about minor layout issues.
• Crucially, cited sources (e.g., ICIC report, business.com, LinkedIn Economic Graph).

Verdict: Claude Code clearly won on thoughtfulness, structure, and credibility.

Test 3: Landing Page for an AI Automation Course

Prompt: design a landing page for a premium AI automation course for agency owners. Include a hero section, social proof, pricing table, and CTA. No planning mode, no design‑specific skills, and no follow‑up questions allowed—just one‑shot outputs.

Claude Code:

• Delivered a solid landing page with strong copy, clear structure, testimonials, curriculum, and pricing.
• Visually, it looked decent but still somewhat generic and “AI‑generated.”

Antigravity:

• Produced a more visually impressive page with animations, depth, and better use of color and layout.
• The overall feel was more premium and modern.

Verdict: Claude Code had better copy and structure; Antigravity clearly won on design and visual polish.

So Which Tool Should You Learn First?

A clear pattern emerges from the tests and long‑term use:

• Claude Code thinks better. It’s stronger at planning, reasoning across multiple files, respecting your existing architecture, and producing high‑quality, maintainable code. It’s also more configurable and is evolving extremely fast.
• Antigravity looks better and feels faster. It’s excellent for quickly spinning up attractive UIs, landing pages, and front‑end‑heavy apps, and it’s easier to try thanks to a generous free tier.

A practical rule of thumb:

• Use Antigravity if design and speed are your top priorities, or if you want to experiment for free before committing to a paid stack.
• Use Claude Code if you care most about code quality, configurability, and production reliability.

For most developers and technical builders, investing deeply in Claude Code as a primary skill makes the most sense right now. Its output quality, control, and rapid development pace are hard to beat—and once you understand how agentic workflows, planning, and context management work in Claude Code, those skills transfer well to tools like Antigravity.

In the long run, it’s less about “this tool kills that tool” and more about picking the right tool—or combination of tools—for each job. You might use Antigravity to design a beautiful front end, then lean on Claude Code to wire up robust back‑end logic and automations behind it.