Antigravity vs Gemini AI Pro
A common misunderstanding: these are not competing products. Antigravity is the IDE and it is free; Google AI Pro is the subscription that raises its ceiling.
Updated August 28, 2026 · Independent comparison — Google Antigravity, Google AI Pro are separate products.
Google Antigravity
Google's agent-first IDE, free in preview
Google Antigravity is an agent-first IDE available free in public preview, with editor, terminal and browser agents plus a CLI. The free tier is metered by a weekly agent quota that Google does not publish numerically, while Tab and Command completions are typically unlimited. To get more headroom you buy a Google AI plan rather than an Antigravity plan; paid tiers share one Gemini quota pool and can purchase AI credits as overage at API rates. Non-Gemini models sit on a separate, smaller limit because of capacity.
Google AI Pro
Google's ~$19.99 AI bundle
Google AI Pro is roughly $19.99/month in the US and is a bundle rather than a coding product: expanded Gemini 3.1 Pro access, Deep Research, Gemini in Gmail and Docs, 5 TB of storage, YouTube Premium Lite, and — the part that matters here — raised quotas in Antigravity, Jules and AI Studio. Google describes the usage increase in adjectives rather than numbers (Expanded, Higher, Highest). It does not mint an API key you can point a third-party agent at; AI Studio keys are a separate product.
Bottom line
Antigravity and Google AI Pro are layers, not alternatives. Antigravity is Google's agent-first IDE — editor, terminal and browser agents plus a CLI — available free in public preview, metered by a weekly agent quota that Google does not publish numerically, with Tab and Command completions typically unlimited. Google AI Pro, at roughly $19.99/month in the US, is a broader bundle (expanded Gemini 3.1 Pro, Deep Research, Gemini in Gmail and Docs, 5 TB storage, YouTube Premium Lite) whose relevance here is that it raises your quotas in Antigravity, Jules and AI Studio. If Antigravity's free weekly cap is enough, you do not need Google AI Pro. If it is not, Google AI Pro is how you buy headroom — and paid tiers can additionally purchase AI credits as overage at API rates.
Pricing
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Price/mo | Free in public preview | About $19.99/mo in the US |
| Intro promo | Not applicable | Google One offers annual terms; 2026 rates not published |
| Billing shape | Quota — weekly agent allowance | Quota — described in adjectives, not numbers |
Models & Context
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Models included | Gemini Flash and Pro family; limited non-Gemini on a separate quota | Gemini 3.1 Pro expanded, Deep Research, Gemini in Gmail and Docs |
| Context window | Not published | Gemini 3.1 Pro is commonly 1M on paid tiers |
Limits & Overage
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Limits (5h / weekly / monthly) | Weekly agent quota, not published numerically; Tab and Command typically unlimited | About 4x the free-tier baseline; exact token caps not published |
| What happens past the cap | Wait — or buy a Google AI plan for more headroom | Buy AI credits as overage at API rates inside Antigravity |
| Parallel-agent friendly | Multi-agent by design; the weekly cap is the throttle | Limited |
Access & Lock-in
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Host agents & IDEs supported | Antigravity IDE on Windows, macOS and Linux, plus the Antigravity CLI | Gemini app, Antigravity, Jules, Gemini CLI, AI Studio, Android Studio |
| Gives you an API key | ✗ | Partial — AI Studio keys exist but are a separate product from the subscription |
| Can drive a third-party agent | No — AI Studio keys are a separate product | No — it raises Google first-party quotas, it does not mint a key for Cline |
| Payment / region friction | Google account; nothing to pay in preview | Geo-localised pricing; VAT/GST extra; some features are US-only |
Verdict at a glance
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Best for | A free, genuinely agentic IDE if the weekly cap fits your work | Google-ecosystem users who also want higher Antigravity quotas |
How they relate
| Feature | Google Antigravity | Google AI Pro |
|---|---|---|
| Is it an IDE | ✓ | No — a subscription bundle |
| Raises Antigravity quota | Not applicable | ✓ |
| Cost | Free in preview | About $19.99/month in the US |
| Buy AI credits as overage | ✗ | ✓ |
| Mints an API key for third-party agents | ✗ | No — AI Studio keys are separate |
The Verdict
Choose Google Antigravity if...
- ✓You want to try a genuinely agentic IDE without paying anything
- ✓The free weekly agent quota covers your usage
- ✓Unlimited Tab and Command completions are most of your value
- ✓You do not want the wider Google bundle
Choose Google AI Pro if...
- ✓Antigravity's free weekly cap is stopping you
- ✓You want expanded Gemini 3.1 Pro, Deep Research and higher Jules and AI Studio limits
- ✓You would use the storage, YouTube Premium Lite and Gmail/Docs integration anyway
- ✓You want the ability to buy AI credits as overage when the quota runs out
Frequently Asked Questions
What is the difference between Google Antigravity and Google AI Pro?
Google Antigravity is an agent-first IDE available free in public preview, with editor, terminal and browser agents plus a CLI. Google AI Pro is roughly $19.99/month in the US and is a bundle rather than a coding product: expanded Gemini 3.1 Pro access, Deep Research, Gemini in Gmail and Docs, 5 TB of storage, YouTube Premium Lite, and — the part that matters here — raised quotas in Antigravity, Jules and AI Studio.
How much do Google Antigravity and Google AI Pro cost?
Google Antigravity: Free in public preview. Google AI Pro: About $19.99/mo in the US. See the pricing table above for full plan details.
Should I choose Google Antigravity or Google AI Pro?
Choose Google Antigravity if you want to try a genuinely agentic IDE without paying anything. Choose Google AI Pro if antigravity's free weekly cap is stopping you.
1DevToolOne window, every agent you're paying for
Whichever seat wins here, you end up locked to one vendor's harness — and most of these subscriptions are contractually barred from driving anything else. 1DevTool runs Claude Code, Codex CLI, Cline, OpenCode and Gemini CLI side by side in persistent terminals, so you can put each subscription behind the agent it's actually licensed for and switch between them without switching windows. It adds an HTTP client, a 13-engine database client and an embedded browser too. One-time $29, no subscription.