Whether Antigravity's free tier is enough depends on how much code you write in a week. The free individual tier costs $0: Tab completions and command requests are unlimited, but agent work has a weekly quota — use it up and you wait until next week. Enough for the occasional small tool; anyone coding with it daily will hit the wall within a week.
| Plan | Monthly cost | How the quota works | Best for |
|---|---|---|---|
| Free individual | $0 | Weekly quota, wait until next week when it's gone | Occasional coding, trying it out |
| Google AI Pro | $19.99 | Refreshes every 5 hours, up to the weekly limit | Solo developers coding every day |
| Ultra 5x / 20x | $99.99 / $199.99 | 5x / 20x Pro | Heavy use, people who earn a living with it |
Google AI Plus at $4.99 a month doesn't raise the Antigravity quota — don't upgrade for that. There's a line on models too: the free tier mainly gets the Gemini family. Claude 5.5 is only for paid Pro and Ultra subscriptions, not trials; after November 2, the free tier also lost Claude 4.6 and GPT-OSS-120b. If you want to code with Claude 5.5, Pro is the minimum bar — that's also the paid-only restriction Google stated when Claude 5.5 launched in Antigravity.
Try free for a week first, then decide whether to pay
Beyond the quota, Pro and Ultra users can buy AI credits to top up; the free tier has no such option — when the quota is gone, you wait. The test is straightforward: use the free tier for a week and count how often you hit the wall. Less than once a week — no need to pay. Hitting it every week — Pro's $19.99 is money well spent. Ultra is only for people who use Antigravity as their main production tool. Students can take the 12-month Pro trial first and decide later. Prices are US list prices; other countries see local prices — go by the price shown in your own account before checkout.
