Google AI Studio free: what you get, limits, and when billing starts

If you’ve just searched “google ai studio free”, here’s the answer in one breath: the AI Studio web app costs nothing in every country where Google offers it, the Gemini API key it hands you starts on a free tier that also costs nothing, and nobody asks for a card. The catch isn’t money. It’s rate limits, and what Google is allowed to do with your prompts while you’re on the free tier. Billing starts only when you link a billing account yourself, and that’s a deliberate click, not a default.

Everything here was checked on Google’s own pages on November 2, 2026. If something below looks different inside your account, trust the account.

The three things people mean by free

“Free” covers three layers, and most confusion comes from mixing them up.

The first is the web app at aistudio.google.com. You sign in with a Google account, pick a model, type a prompt, and get an answer. That usage is free of charge in all available regions, full stop. No trial clock, no credit balance to watch.

The second is the API. AI Studio creates a Gemini API key for you, and that key starts on what Google calls the Free Tier. Input and output tokens cost nothing on the free models, which today include Gemini 3.8 Flash, Gemini 3.6 Flash, the 3.5 and 3.1 Flash-Lite models, Gemma 4, the embedding models, the Flash text-to-speech models and the Live audio models. The 2.5 generation is also free but deprecated, and Google reroutes 2.5 Pro and 2.5 Flash calls to newer models on December 1, 2026, so don’t build anything new on them.

The third is the paid tier, which you enter only by linking a billing account and prepaying at least $5. That opens the models the free tier doesn’t serve, including Gemini 4 Argon, Gemini 3.1 Pro Preview, the image models and the Lyria music models. For a prototype chatbot or a document summarizer, the first two layers are plenty. Our Gemini API free tier and pricing guide has the per-model prices if you reach layer three.

Getting an API key without a card

Sign in, open the API Keys page, and click Create API key. If you’re new to Google Cloud, AI Studio already created a default project and a key the moment you accepted the terms, so you may find one waiting. Existing Google Cloud users don’t get a default project; open Dashboard, then Projects, click Import projects, pick your project, and create the key against it.

No payment method is involved at any point. The key works immediately on the free tier.

Treat the key like a password. Anyone who has it can burn through your quota, and once billing is on, your money. If it leaks, make a new key and disable the old one.

The limits you’ll actually hit

Free tier limits come in three flavors: requests per minute, input tokens per minute, and requests per day. Hit any one of the three and the API returns a rate limit error, even if the other two have room. Daily counts reset at midnight Pacific time, which is 12:30 pm in India for most of the year and 1:30 pm during US daylight saving.

Two details matter more than the numbers. Limits apply per project, not per API key, so five keys in one project share one quota. And Google no longer publishes the free tier figures; you see your live limits inside AI Studio after you sign in, with a warning that they aren’t guaranteed and real capacity can vary.

The free tier is sized for one person building and testing. A classroom demo, a weekend project, a script that runs a few hundred times a day: fine. A production app with real users will hit the per-minute ceiling on the first busy afternoon, and that’s when to read the billing section below. Our API free tiers hub compares what other providers give away if Gemini’s limits don’t fit.

What Google does with your prompts on the free tier

On the free tier, Google uses what you send and what the model returns to provide, improve and develop its products, and human reviewers may read, annotate and process your input and output. Google says it disconnects that data from your account and project before a reviewer sees it. The terms are blunt: do not submit sensitive, confidential or personal information to the unpaid services.

Switch to the paid tier and that stops. Paid prompts and responses aren’t used to improve Google’s products, and logging is limited to safety and legal purposes for a limited period.

One regional exception works in your favor. If you’re in the European Economic Area, Switzerland or the United Kingdom, the paid tier’s data terms apply to everything, including the AI Studio app and your unpaid API quota. The same holds if your account is linked to an active Cloud Billing account or is a Workspace enterprise account.

We’d keep anything with a customer’s name or a contract in it off the free tier. $5 of prepaid credit buys the paid data terms, and that’s cheaper than explaining a leak.

Using AI Studio from India

India is on Google’s supported list for both AI Studio and the Gemini API, so a student in Pune gets the same free app and the same free tier as a developer in Austin. The requirements are short: a Google account, being 18 or older (Google may ask you to verify age before AI Studio opens), and nothing else. No card, no college email, no application.

The data terms above apply exactly as written, because India isn’t in the EEA, UK or Switzerland group. Free tier prompts can be reviewed by people. For coursework that’s fine. For a project that handles other people’s data it isn’t, and the fix is the same $5 prepay, which Google accepts in equivalent local currency. If AI Studio bounces you to the available regions page anyway, check that your account’s age is verified before assuming the region is blocked.

AI Studio, the Gemini API and Vertex AI are three doors to one model

People search “google ai studio vs gemini api” as if they were rivals. They aren’t. AI Studio is the website, the Gemini API is what your code calls, and the key AI Studio creates connects them. The free tier belongs to the key.

Vertex AI is the third door, and it’s a different building. It’s the Google Cloud route to the same Gemini models, authenticated with service accounts instead of an API key and billed to your Cloud billing account. Google’s own guidance is that most developers should use the Gemini Developer API unless they need specific enterprise controls. There’s no AI Studio-style free tier on Vertex, so if your question is “where can I call Gemini for free”, the answer is the API key, not the Cloud console.

Credits follow the same split. The $300 Google Cloud Welcome credit, covered in our Google Cloud free trial guide, cannot pay for Gemini API or AI Studio usage on accounts opened after March 2, 2026. It still covers Gemini through Vertex AI and everything else on the Google Cloud credits page. For money that reaches the API key itself, see Gemini API credits.

When billing starts and how to keep it small

Billing starts when you click Set up billing on the API keys page or the Projects page. You pick a country, add a payment method or choose an existing billing account, then prepay. The minimum is $5 and the most you can load at once is $5,000. Credits expire 12 months after purchase and aren’t refundable, so load what you’ll use.

The upgrade moves your project to Tier 1, which carries a $250 monthly spend cap. Spend $100 and wait three days after your first payment and you’re on Tier 2 with a $2,000 cap; $1,000 and 30 days gets Tier 3, where the cap runs from $20,000 to over $100,000. Upgrades happen on their own, usually within about ten minutes.

Prepay is the control we like most. When the balance hits $0, every API key in every project linked to that billing account stops at once and requests fail with HTTP 402. You can’t overspend money you haven’t loaded. If you turn on auto-reload, set the monthly auto-charge limit, or a runaway script will keep topping itself up. There’s also a project spend cap, still marked experimental, on the Spend page under Monthly spend cap, then Edit spend cap.

Enabled billing by mistake? Unlink the project from its billing account and it returns to the free tier, data terms included. Our guide to avoiding surprise cloud bills covers the alerts worth setting the day you link a card, and the Gemini API review weighs the paid tier against the alternatives.

The short version

The AI Studio web app is free of charge in every supported country, India and the US included, with no card and no trial clock.
The API key AI Studio creates starts on a free tier with free tokens on the Flash, Flash-Lite, Gemma, embedding, TTS and Live models.
Free tier prompts and outputs can be used to improve Google’s products and read by human reviewers, except in the EEA, UK and Switzerland, so keep sensitive data off it.
Billing starts only when you click Set up billing and prepay at least $5. The $300 Cloud Welcome credit doesn’t cover Gemini API or AI Studio on accounts opened after March 2, 2026.
Prepay stops at $0, Tier 1 caps at $250 a month, and unlinking the project sends you back to free.

FAQ

Is Google AI Studio really free

Yes. Using the AI Studio app is free of charge in all available regions, and the Gemini API key it creates starts on a free tier with free tokens on the Flash, Flash-Lite, Gemma, embedding, TTS and Live models. You pay only if you link a billing account and prepay.

Do I need a credit card for Google AI Studio

No. Signing in, prompting in the app and creating an API key all happen without a payment method. A card comes in only when you click Set up billing, and even then you can stop at a $5 prepay.

What are the Google AI Studio free tier limits

Google caps the free tier by requests per minute, input tokens per minute and requests per day, applied per project rather than per key, with daily counts resetting at midnight Pacific. The exact figures appear in AI Studio after you sign in.

Does Google train on my prompts in AI Studio

On the free tier, yes. Google uses free tier prompts and responses to improve its products and human reviewers may read them. Paid tier data isn’t used that way, and users in the EEA, UK and Switzerland get the paid terms even on the free tier.

Can I use Google AI Studio for free in India

Yes. India is on Google’s supported list for both AI Studio and the Gemini API. You need a Google account verified as 18 or older and nothing else; the free tier and its terms are the same as in the US.