Google AI Pro vs Ultra for Antigravity in 2026: which plan to buy, and when

Disclosure: Enjoy is our product, and it runs Antigravity. We checked every plan and price below against Google’s, Anthropic’s and OpenAI’s own pages on November 8, 2026, and we say where you don’t need Enjoy at all, which is most of the time.

Google’s plans for Antigravity, compared

Antigravity’s quota comes with your Google account’s Google AI plan: “Rate limits and model availability differ based on your Google AI plan,” says Google’s plans page. Every plan gets Antigravity’s features and Gemini 3.8 Flash. What you pay for is quota and, from Pro up, Claude and Gemini 4 Argon. These are the ways to pay for it, side by side.

Option	Best for	Price, checked November 8, 2026	Models in Antigravity	Quota
No plan	Trying Antigravity on Gemini 3.8 Flash	Free	Gemini 3.8 Flash; Claude Sonnet and Opus 4.6 and GPT-OSS-120b until November 18	Refreshed weekly
Google AI Plus	Storage and the Gemini app, not Antigravity	$4.99 a month	The same as no plan	The same as no plan
Google AI Pro	Claude and Argon in Antigravity, on a five-hour clock	$19.99 a month, or $199.99 a year	Adds Gemini 4 Argon, Claude Sonnet 5.5 and Opus 5.5, on a paid plan	Every five hours, until a weekly limit
Google AI Ultra 5x	Running out of Pro most weeks	$99.99 a month	The same as Pro	Every five hours; “Higher rate limits” than Pro
Google AI Ultra 20x	Agents running all day	$199.99 a month	The same as Pro	Every five hours; “Highest rate limits”
Pro or Ultra plus AI credits	Running out now and then	Your plan, plus credits from Google One	Your plan’s	Credits after the quota
A Gemini API key, in Antigravity CLI	Scripts, CI, and Gemini without a plan	Per token; Gemini 3.8 Flash free on the API’s free tier	Gemini models	The API’s limits, not a plan’s
Google AI Pro plus Claude Pro or ChatGPT Plus	Two labs’ limits for about $40	$19.99 plus $20 a month	Pro’s, plus Claude Code’s or Codex’s	Each plan’s own
Gemini Enterprise	Teams, under Google Cloud’s terms	From $30 a seat a month, or pay as you go	Adds Gemini 3.1 Pro, 3.7 Flash and 3.6 Flash	Set by your Gemini Enterprise plan
Enjoy, with any of the above	Handing an Antigravity conversation to Claude Code or Codex	A monthly subscription on top of your plans, free for 7 days (pricing)	Your plans’	Your plans’

Prices are each company’s US list prices, before tax. Google doesn’t publish the size of any Antigravity quota, so the last column is in its own words. “Ultra plans are billed monthly only,” says Google One.

What every plan gets, and what Google doesn’t publish

Every plan, free included, gets “Use of Gemini models, including Gemini 3.8 Flash,” “Unlimited Tab completions” and “Access to all product features, such as scheduled tasks and the CLI,” per the plans page. So a plan decides two things: which models you can pick, and how much the agent can do before it stops.

The models are on Google’s models page. Gemini 4 Argon is on Pro, Ultra and Enterprise. Claude Sonnet 5.5 and Opus 5.5 are on Ultra and Enterprise, and “Available on Google AI Pro for non-trial subscriptions only.” Claude Sonnet 4.6, Opus 4.6 and GPT-OSS-120b, the only Claude and OpenAI models on Free and AI Plus, are marked “Will be removed on November 18, 2026.” After that, an account without Pro or Ultra has Gemini 3.8 Flash. Our memo on the change has the details.

The quota is harder to compare, because Google publishes no sizes. Its plans page gives accounts without a plan “A meaningful quota, refreshed weekly,” Pro “A high, generous quota, refreshed every five hours until the weekly limit is reached,” and Ultra “The highest, most generous quota, refreshed every five hours,” with “The highest weekly rate limits.” The limits “correlate with the amount of work done by the agent,” so “more complex tasks consume more quota,” and “Usage limits for this service are subject to modification.”

Ultra’s names aren’t Antigravity multiples. Google’s subscriptions page sells Ultra with “5x higher usage limits vs. AI Pro” or “20x higher usage limits vs. AI Pro,” and its plan table puts those multiples under Gemini. Under Google Antigravity, the table rates “Agent requests” as “Expanded” on Pro, “Higher” on Ultra 5x and “Highest” on Ultra 20x, and the subscriptions page gives Pro “Entry rate limits to agent model in Google Antigravity.” Google hasn’t said that Ultra 5x buys five times Pro’s Antigravity quota, so don’t count on it.

You can’t bring another plan to it, either. The plans page says “There is currently no support” for “Bring-your-own-key (BYOK) or bring-your-own-endpoint for additional rate limits.”

No plan

Best for: trying Antigravity, and light work on Gemini 3.8 Flash.

Antigravity’s pricing page offers it at “$0/month” to “Experience Antigravity without a subscription plan,” with “Unlimited Tab completions,” “Unlimited Command requests” and “Basic weekly rate limits.” Until November 18, it also has Claude Sonnet 4.6 and Opus 4.6.

Price: free.

Watch for: the quota is “refreshed weekly,” so a limit you hit early in the week can last days, and after November 18 there’s one agent model, Gemini 3.8 Flash. Our quota guide covers the free ways to keep going in the meantime.

Google AI Plus

Best for: storage and the Gemini app, not Antigravity.

AI Plus is $4.99 a month for 400 GB of storage and “2x higher usage access than Free” in the Gemini app. In Antigravity, it gets nothing more: the models page puts “Free & Google AI Plus” in one column, and the plans page gives every account “not on Google AI Pro or Ultra plans” the same weekly quota.

Price: $4.99 a month.

Watch for: there’s no way past its weekly limit, because “AI credits are not available for purchase for Google AI Plus plans,” says Google One. It also loses Pro models in the Gemini app on November 13, going by the email to subscribers that 9to5Google reported; our memo has the details. If you pay for AI Plus only for Antigravity, Pro is the step that changes anything there.

Google AI Pro

Best for: Claude Sonnet and Opus 5.5 and Gemini 4 Argon in Antigravity, on a quota that refreshes every five hours.

Pro is the cheapest plan with Claude in Antigravity after November 18. Its quota is “refreshed every five hours until the weekly limit is reached,” you can buy AI credits on it, and it’s one of the two plans that get remote agents, which “continue working on long-running tasks and executing commands even when you close your browser, put your laptop to sleep, or switch between desktop and mobile devices.” Antigravity’s changelog says those “are starting to roll out to Google AI Ultra and Pro subscribers.” The rest of the plan, per Google One, includes 5 TB of storage, YouTube Premium Lite where it’s offered, the Gemini app’s Pro model, and “$10 in monthly Google Cloud credits from Google Developer Program.”

Price: $19.99 a month, or $199.99 a year.

Watch for: a free trial isn’t the same plan. Google’s FAQ says “Some models require a paid Google AI Pro or Google AI Ultra subscription and are not included in free trials”: Claude 5.5 is for “non-trial subscriptions only,” and Argon is “Available with paid Google AI Pro plans or on trial with eligible premium devices.” To get them during a trial, “Submit a request to cancel your trial and switch to a paid Google AI Pro plan.” And Pro has a weekly limit on top of the five-hour one.

Google AI Ultra

Best for: running out of Pro’s weekly limit most weeks, especially if you’d use Ultra’s other perks.

Ultra has the same Antigravity models as Pro, with “The highest, most generous quota, refreshed every five hours” and “The highest weekly rate limits.” It comes in two sizes: Ultra 5x, with “Higher rate limits to agent model in Google Antigravity,” and Ultra 20x, with “Highest rate limits.” Beyond coding, Google’s plan table gives Ultra 5x 20 TB of storage and Ultra 20x 30 TB, both YouTube Premium individual, and $40 or $100 a month of Google Cloud credits.

Price: $99.99 a month for Ultra 5x and $199.99 for Ultra 20x. “Ultra plans are billed monthly only.”

Watch for: Google doesn’t say how much more Antigravity work either Ultra buys over Pro, and Ultra still has a weekly limit, “the highest” one. At five times Pro’s price, buy Ultra 5x when Pro’s weekly limit stops you most weeks, not after one bad week, and try credits first.

Pro or Ultra plus AI credits

Best for: running out now and then, when an upgrade would sit unused most weeks.

“Users on Google AI Pro or Ultra plans can use purchased AI credits (or any one-time promotional credits) for additional overage usage above the baseline quota,” says the plans page. You buy them from Google One, in amounts such as “2,500, 5,000, or 20,000 AI credits,” with auto-reload if you want it. In the app, the AI Credit Overages setting decides when they’re used: Never waits “until the baseline quota refreshes,” and Always uses them “when the baseline quota is exhausted.” In Antigravity CLI, it’s the Use AI Credits field under /config, as its credits docs describe.

Price: your plan, plus the credits you buy. Google says “AI credits are consumed at standard Gemini Enterprise consumption pricing,” but none of the pages we read gives a credit’s price in dollars or says how many credits a request uses.

Watch for: not everyone can buy them. Google One says members “subscribed through a third party, Pixel Pass, or Apple billing” can’t, and “AI credits are not available for purchase in Japan.” They “may expire after a certain period, as set out when you acquire them.” With Always on, Antigravity moves from your quota to your credits without stopping, so keep an eye on the balance.

A Gemini API key, in Antigravity CLI

Best for: scripts, CI, and Gemini without a Google AI plan.

Google’s install guide says you can “Run Antigravity CLI with your own Gemini API key instead of a signed-in Google account,” and that “Model requests go directly to the Gemini API.” It adds: “This suits headless and CI runs, where no browser is available to complete a sign-in.”

Price: per token, at Gemini API prices. Gemini 3.8 Flash is “Free of charge” on the free tier. On the paid tier it’s $0.75 per million input tokens and $3.75 per million output tokens “through December 31, 2026,” rising to $1.50 and $7.50 “starting January 1, 2027.” Gemini 4 Argon “is not available on the Free tier,” and costs $2 in and $10 out through November 30, then “$4.00 starting December 1, 2026” in and $20 out.

Watch for: it’s Gemini only, in the CLI, and “Only setting a GEMINI_API_KEY environment variable on its own has no effect”: you set a provider too. Argon’s price doubles on December 1 and Flash’s on January 1, so a heavy month on the API can cost more than Pro.

Google AI Pro plus a Claude or ChatGPT plan

Best for: two labs’ limits for about $40, well under Ultra 5x.

Google’s limits and Anthropic’s or OpenAI’s are separate, so when Antigravity’s week runs out, Claude Code or Codex still works. Claude’s pricing says “Claude Code is included in all paid plans,” and Pro is “$20 if billed monthly,” or $17 a month billed yearly. OpenAI describes ChatGPT Plus for Codex as “Power a few focused coding sessions each week” in its pricing guide, at “$20/month,” its help center says. Our Antigravity vs Claude Code guide compares the agents.

Price: $39.99 a month, or $36.99 with Claude Pro billed yearly.

Watch for: your Antigravity login doesn’t work in the other agents. Google’s FAQ says “Using third-party software, tools, or services to access Antigravity is a violation of our Terms of Service,” and “Such actions can result in suspension or termination of your account.” Claude Pro has limits of its own, “More usage than Free, every 5 hours and every week.” And each agent keeps its own conversations, so when you move a task, you tell the second agent where things stand.

Gemini Enterprise, for teams

Best for: a company that wants Antigravity under Google Cloud’s terms, with admin controls.

Antigravity’s pricing page has a “Business plan via Google Cloud,” with “Standard/Plus plans starting at $30 USD per seat per month” for “eligible Gemini Enterprise customers,” and a “Pay-as-you-go plan with $0 seat fee and consumption based pricing.” Enterprise gets every model on the models page except the three leaving on November 18, including Gemini 3.1 Pro, 3.7 Flash and 3.6 Flash, which no personal plan has.

Price: from $30 a seat a month, or pay as you go.

Watch for: it’s for “eligible Gemini Enterprise customers,” not a sign-up for one person, and to use remote agents in a browser, Google says to “Sign in with a personal Google Account on an eligible plan (Google AI Pro or Google AI Ultra).”

Enjoy, with any of these

Best for: getting the most from the Google plan you buy, and handing a conversation to Claude Code or Codex when Antigravity runs out.

Enjoy isn’t a Google plan: it runs Antigravity on your Google account, along with Claude Code, Codex, Grok Build, Muse Code and local models through OpenCode, on Mac, Windows and Linux, each on its own lab’s plan. What it adds to this choice:

• It shows what’s left. Its usage meters show “the limits Google shows for each group of models, such as Gemini · Weekly,” and when each resets.
• It keeps going through limits. When Antigravity runs out, Enjoy waits until the limit resets, then tries again, “and the agent continues where it left off.”
• It hands the conversation to another agent. Pro plus a Claude or ChatGPT plan works better when the second agent “gets the conversation so far, including replies from other agents,” as our guide to switching agents puts it.

Price: Enjoy is one monthly subscription, and the first seven days are free, with a card to start. It includes your phone and any browser and one computer; each other computer is $9.99 a month, and each teammate you invite needs a subscription of their own. See pricing.

Watch for: Enjoy doesn’t add to Google’s quota or put Claude on a Google account. Antigravity in Enjoy runs “the Gemini models Google offers your account,” as our Antigravity guide says, so if you buy Pro for Claude in Antigravity, use Google’s own app for that, or Claude Code on a Claude plan. Antigravity uses one Google account in every project, so Enjoy can’t move it to a second account the way it does for Claude Code, Codex and Grok Build. Waiting for a reset needs “Your computer must be on, with Enjoy open, when the usage resets,” and scheduled workflows run only while it’s awake with Enjoy open. Enjoy runs Antigravity through the server Google offers “for Xcode, JetBrains IDEs, Zed, and custom ACP clients,” as its changelog puts it, not by wrapping agy. Enjoy isn’t open source, and it’s a monthly subscription on top of your AI plans once the free week ends.

When to stay on the plan you have

• No plan, if Gemini 3.8 Flash does your work and a weekly refresh is enough. Paying Google changes the models and the quota, not the features.
• Pro, if you run out once or twice a month. A five-hour refresh clears by itself, and credits cover the odd afternoon. Ultra 5x costs five times as much, for a quota Google hasn’t sized.
• Ultra, if Pro’s weekly limit stopped you most weeks, or you’d pay for the storage, YouTube Premium or Flow credits it includes anyway. If Ultra 20x rarely runs out, see whether Ultra 5x would do.

AI Plus is the one plan to leave if you bought it for Antigravity. To move up, Google’s FAQ says “Subscribe to a paid Google AI Pro or Google AI Ultra plan on Google One.”

How we compared

We read Antigravity’s plans, models, pricing, FAQ, install, credits and remote agents pages and its changelog, Google’s subscriptions and Google AI plans pages, Google One’s help on AI credits, the Gemini API’s pricing, Claude’s pricing, and OpenAI’s Codex pricing guide and Plus help article on November 8, 2026, and every one is linked below. We quote each company’s own words for its limits and leave out what it hasn’t published, including the size of any Antigravity quota and a credit’s price in dollars. Plans and limits change often, so we recheck this guide against its sources at least once a month, and the date at the foot of the page says when we last did.