Modelpeers
Antigravity Agent (Gemini Managed Agents) charactervsClaude Code character

Google Antigravity vs Claude Code: Which coding agent should you use?

Facts checked Oct 22, 2026. Every number links to its source.

Summary

Derived from sourced facts, not from builder opinions
  • Antigravity has a free plan with Gemini 3.8 Flash and a weekly quota. Claude Code starts with Claude Pro at $20 a month.
  • Antigravity also runs Claude Opus 5.5 and Sonnet 5.5 on a paid Google AI Pro plan ($19.99 a month) or Ultra.
  • Claude Code with Opus 5.5 leads Terminal-Bench 4.0 at 64.85%. Antigravity has no entry on that board.
  • Gemini 4 Argon, Google's newest model, needs a paid Pro or Ultra plan and runs in the Antigravity App, CLI and IDE extensions, not the Antigravity IDE.

Choose Google Antigravity if

  • You want to start free.
  • You want Gemini and Claude models in one tool.
  • You want a desktop app that runs several agents in parallel, plus an IDE, CLI and SDK.

Choose Claude Code if

  • You want an agent with a published Terminal-Bench 4.0 result (64.85% with Opus 5.5).
  • You want Claude Fable 5.1 or Haiku 5.5, which Antigravity does not list.
  • You use Claude through Bedrock, Google Cloud or Foundry.
  • You want to use your own API key, which Antigravity does not support.
Google Antigravity
Claude Code

Follow both to get an email when either one changes its price, limits or behavior.

Plans

Google Antigravity plans

Free
Free

Gemini 3.8 Flash · weekly quota

Google AI Plus
$4.99/month

Gemini 3.8 Flash · same model list as Free

Google AI Pro
$19.99/month

Gemini 4 Argon, Claude Opus 5.5 and Sonnet 5.5 (non-trial) · quota refreshed every 5 hours

Google AI Ultra
$99.99/month

5x Pro usage limits · $199.99 for 20x

Claude Code plans

Pro
$20/month

Claude Code included · billed $17/month annually

Max
$100/month

From $100: 5x or 20x Pro usage

Team Standard seat
$25/month

Per seat, monthly · $20 billed annually

Team Premium seat
$125/month

5x a standard seat · $100 billed annually

Enterprise
$20/month

Per seat billed annually, 20-seat minimum, plus usage at API rates

Subscription agents are priced per seat with usage limits, so this compares plans rather than dividing a subscription by a guessed number of tasks.

Side by side

Google AntigravityClaude Code
MakerGoogle
Anthropic
PlatformsAntigravity App (desktop agent manager), CLI, IDE, extensions for VS Code, Visual Studio, JetBrains, Zed and Xcode, Python SDK
Terminal CLI, VS Code, JetBrains, desktop app (macOS, Windows, Linux beta), web, iOS and Android app
PlansFree $0 · Google AI Plus $4.99 · Google AI Pro $19.99/month · Google AI Ultra $99.99 or $199.99 · Business through Google Cloud and Gemini Enterprise from $30/seat
Not in Free. Pro $20/month ($17 annual) · Max from $100 (5x or 20x Pro usage) · Team Standard $25/seat monthly ($20 annual), Premium $125 ($100 annual) · Enterprise $20/seat plus usage at API rates
Free planGemini 3.8 Flash, unlimited Tab completions, a weekly quota
Not published
Usage limitsFree: weekly quota · Pro: quota refreshed every 5 hours up to a weekly limit · Ultra: highest · no published numbers · AI credits for overage on Pro and Ultra
Per-seat 5-hour and weekly windows · weekly Claude Code limits 25% above pre-May 2026 levels since 2026-09-14 · no published per-plan numbers
ModelsGemini 4 Argon (Pro and Ultra, not in the Antigravity IDE), Gemini 3.8 Flash, Claude Opus 5.5 and Sonnet 5.5 (paid, non-trial Pro and Ultra), Claude Sonnet 4.6 and Opus 4.6 on Free and Pro until 2026-11-02, GPT-OSS 120B
Built for Claude models: aliases opus (Opus 5.5), sonnet (Sonnet 5.5), haiku (Haiku 5.5), fable (Fable 5.1, may bill usage credits) · third-party providers Bedrock, Google Cloud, Foundry
Model removalsClaude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS 120B leave on 2026-11-02
Not published
Bring your own keyNot supported
Not published
Also in the Gemini APIThe Antigravity agent runs as a managed agent in Google-hosted sandboxes, in preview since 2026-05-19
Not published
Use with other toolsNot publishedSubscription OAuth may not be used to route requests for third-party products

Scores appear side by side only when both were published for the same test. Settings differ between sources, so small gaps can reverse under another harness.

Updates

Google Antigravity

Breaking change

Antigravity agent 09-2026 changes built-in tools, 05-2026 shuts down October 5

Google released antigravity-preview-09-2026, replacing antigravity-preview-05-2026. Tool parameters move to PascalCase and file edits use line-range replacements. The 05-2026 version shuts down on October 5, 2026.

Before

antigravity-preview-05-2026

After

antigravity-preview-09-2026

Who is affected:
Apps that run the Antigravity agent with local tools or that parse its function_call steps.
Action needed:
Update the agent string and adapt any code that handles the built-in tool calls.

Claude Code

27 recorded incidents in the last 90 days.

Switching checklist

  1. Install Claude Code with curl -fsSL https://claude.ai/install.sh | bash on macOS or Linux, or irm https://claude.ai/install.ps1 | iex in Windows PowerShell, then run claude in your project.
  2. Sign in with a Pro, Max, Team or Enterprise plan, or a Console account. The free Claude plan does not include Claude Code.
  3. Keep AGENTS.md: Antigravity and Claude Code both read it as workspace instructions.
  4. Import GEMINI.md into a CLAUDE.md with a line such as @GEMINI.md, since Claude Code does not read GEMINI.md on its own.
  5. Move rules from .agents/rules/*.md into .claude/rules/. Drop Antigravity's trigger frontmatter and scope rules to paths instead.
  6. Recreate the servers from .agents/mcp_config.json with claude mcp add-json.
  7. Plan for Claude models only: Claude Code's built-in choices are Opus, Sonnet, Haiku and Fable, so Gemini models stay in Antigravity.
  8. Run one real task in your own repository with both tools and compare the diffs before moving a team.

FAQ

Is Google Antigravity free?

Yes. The free plan includes Gemini 3.8 Flash, unlimited Tab completions and a quota refreshed weekly. Google AI Pro and Ultra raise the limits.

Can Antigravity use Claude models?

Yes. Claude Opus 5.5 and Sonnet 5.5 are available on paid, non-trial Google AI Pro and on Ultra. Claude Sonnet 4.6 and Opus 4.6 are also listed on Free and Pro until November 2, 2026.

Is Claude Code better than Antigravity?

There is no shared test. Claude Code with Opus 5.5 leads Terminal-Bench 4.0 at 64.85%, and Antigravity has no entry.

How much does Google AI Pro cost?

$19.99 a month in the US. Ultra costs $99.99 for 5x Pro's limits or $199.99 for 20x.

Does Antigravity read AGENTS.md?

Yes. It reads AGENTS.md and GEMINI.md in your workspace folders and keeps them always on.

Can I use my own API key in Antigravity?

No. Antigravity does not support bringing your own key.

How much does Claude Code cost?

It comes with Claude Pro at $20 a month ($17 billed annually) and Max from $100. It is not in the free plan.

Related comparisons

OpenAI Codex vs Claude CodeCursor vs Claude CodeOpenClaw vs Claude CodeClaude Code vs GitHub CopilotClaude Code vs ChatGPTCursor vs Google AntigravityGemini CLI vs Claude CodeGoogle Antigravity pageClaude Code page

Sources and method

Prices, specs and limits come from each maker's own pages. Benchmark scores come from independent benchmark publishers and the makers' announcements, with the setting each was measured in. Changes come from changelogs, deprecation pages and status pages. The summary is written from these facts only.