Google AI Studio Pricing 2026: Free to Use, API From $0.25 per 1M Tokens

Updated: November 1, 2026

Google AI Studio is free to use, and there is no AI Studio subscription. You pay only when a project moves onto the paid tier of the Gemini API, where billing is per token: on Google's official price list the cheapest text model open to new projects, Gemini 3.1 Flash-Lite, starts at $0.25 per 1M input tokens, Gemini 3.8 Flash costs $0.75 input and $3.75 output until December 31, 2026, and the flagship Gemini 4 Argon costs $2.00 input and $10.00 output until November 30, 2026, with both rates doubling after those dates.

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Model	Free tier	Paid input / 1M	Paid output / 1M	Scheduled change
Gemini 4 Argon	Not available	$2.00	$10.00	$4.00 / $20.00 from Dec 1, 2026
Gemini 3.8 Flash	Free of charge	$0.75	$3.75	$1.50 / $7.50 from Jan 1, 2027
Gemini 3.6 Flash	Free of charge	$0.75	$3.75	$1.50 / $7.50 from Jan 1, 2027
Gemini 3.5 Flash-Lite	Free of charge	$0.30	$2.50	None listed
Gemini 3.1 Flash-Lite	Free of charge	$0.25	$1.50	None listed
Gemini 3.1 Pro Preview	Not available	$2.00	$12.00	None listed

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The free and paid tiers also differ in rate limits, billing caps and data use: on the paid tier Google states that it does not use prompts and responses to improve its products, and a newly billed project starts at Tier 1 with a $250 billing cap. Every figure here was checked on Google's Gemini API pricing, billing, rate-limit and terms pages on November 1, 2026.

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GOOGLE AI STUDIO IS FREE; THE GEMINI API IS WHAT GETS BILLED.

Google's billing documentation states that AI Studio usage remains free of charge unless the user links a paid API key for access to paid features. Opening AI Studio, writing prompts, uploading files and testing models in the browser therefore costs nothing, and Google does not sell a monthly AI Studio plan.

Charges start at the level of the Gemini API project. New accounts begin on the Free Tier, which gives access to selected models within rate limits, and a project moves to the paid tiers once a Cloud Billing account is linked and, for prepaid accounts, credits are purchased. From that point the API key attached to the paid project is billed for every input token, output token, cached token and paid tool call it consumes, whether the request comes from an application or from AI Studio itself.

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Layer	What you pay	What limits it	Typical use
Google AI Studio interface	Nothing	Model access and rate limits of the linked project	Prompt design, testing, prototypes
Gemini API Free Tier	$0 on eligible models	Lower rate limits, selected models only	Prototypes and small personal projects
Gemini API paid tiers	Per token and per tool call	Usage tier, billing cap, spend-rate limit	Production applications

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GEMINI 4 ARGON, 3.8 FLASH AND FLASH-LITE PRICES ON THE PAID TIER.

The official price list is per model and per million tokens, with output prices that include the model's thinking tokens. A reasoning-heavy request can therefore be billed for far more output than the visible answer, which makes the output rate the figure to watch for agents and complex prompts.

Gemini 4 Argon is Google's current flagship and is available only on the paid tier. Its model page lists a unified context window of 1,048,576 tokens, a default synchronous output of 65,536 tokens and long decodes of up to 1M tokens, with text, image, video, audio and PDF inputs. Its introductory standard price of $2.00 input and $10.00 output ends on November 30, 2026, and from December 1 the list price becomes $4.00 and $20.00.

Gemini 3.8 Flash is the stable Flash model Google recommends for new projects, with a 1,048,576-token input limit and a 65,536-token output limit. It is free of charge on the Free Tier and costs $0.75 input and $3.75 output on the paid tier through December 31, 2026, rising to $1.50 and $7.50 on January 1, 2027. Gemini 3.6 Flash, which Google describes as the previous-generation Flash model, carries the same rates and the same scheduled increase.

Gemini 3.5 Flash-Lite costs $0.30 input for text, image, video and audio and $2.50 output, and Gemini 3.1 Flash-Lite costs $0.25 input for text, image and video, $0.50 for audio input and $1.50 output. Neither Flash-Lite model has a price change on the current page. Gemini 3.1 Pro Preview is priced at $2.00 input and $12.00 output for prompts up to 200,000 tokens and $4.00 and $18.00 above that threshold, without a free tier.

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Gemini 3.8 Flash cost item	Through Dec 31, 2026	From Jan 1, 2027
Input / 1M tokens	$0.75	$1.50
Output / 1M tokens	$3.75	$7.50
Context-cache input / 1M tokens	$0.075	$0.15
Cache storage / 1M tokens per hour	$0.50	$1.00

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BATCH, FLEX AND PRIORITY CHANGE THE GEMINI API PRICE PER REQUEST.

Google publishes four consumption modes for its main models. Standard is the normal interactive mode; Batch and Flex trade latency or capacity guarantees for half the standard token price; Priority costs more for higher service priority. For Gemini 3.8 Flash, Batch and Flex cost $0.375 input and $1.875 output today, and Priority costs $1.35 and $6.75, with all of them doubling on January 1, 2027.

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Mode (paid tier)	Gemini 4 Argon to Nov 30	Gemini 3.8 Flash to Dec 31	Gemini 3.5 Flash-Lite
Standard	$2.00 / $10.00	$0.75 / $3.75	$0.30 / $2.50
Batch	$1.00 / $5.00	$0.375 / $1.875	$0.15 / $1.25
Flex	$1.00 / $5.00	$0.375 / $1.875	$0.15 / $1.25
Priority	$3.60 / $18.00	$1.35 / $6.75	$0.54 / $4.50

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Prices are input / output in USD per 1M tokens. Google also lists an invite-only Contributor tier at Batch-level prices for some models, where submitted content is used to improve Google products, so it is a different trade-off from the standard paid tier and is not open to every account.

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GROUNDING, CACHING AND OTHER EXTRA COSTS IN THE GEMINI API.

Token rates are only part of the bill when an application uses tools. For Gemini 3 and newer models on the paid tier, Grounding with Google Search includes 5,000 search requests per month shared across the whole model family, then costs $14 per 1,000 requests, with a default cap of 1,500 grounded requests per day per project. Grounding with Google Maps follows the same 5,000-request allowance and $14 rate. On the Free Tier, search and Maps grounding are not available for these models through the API and can only be tested inside AI Studio.

Context caching lowers the cost of repeated input when a large, stable context is reused, but cache storage is billed per million tokens per hour. On Gemini 3.8 Flash the cached input rate is a tenth of the standard input rate, while storage costs $0.50 per 1M tokens per hour until the end of 2026, so caching pays off only when the same context is read many times while it is stored.

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GOOGLE AI STUDIO USAGE TIERS, BILLING CAPS AND RATE LIMITS.

Paid projects move through usage tiers based on the linked billing account's payment history, and each tier carries a monthly billing cap and a spend-rate limit measured over a rolling 10-minute window. When the cumulative account total reaches the tier cap, Google pauses service for all projects on that account until the next billing cycle. Google adds that whether the spend-rate limits apply depends on billing history and account standing.

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Usage tier	Qualification	Billing cap	Spend-rate limit / 10 min
Free	Active project or free trial	N/A	N/A
Tier 1	Active billing account linked	$250	$10
Tier 2	$100 paid + 3 days since first payment	$2,000	$50
Tier 3	$1,000 paid + 30 days since first payment	$20,000 to $100,000+	$200

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Google does not publish one general table of per-model requests-per-minute and tokens-per-minute limits; the rate-limit page says active limits depend on the usage tier and should be viewed in AI Studio, and that specified limits are not guaranteed. A 429 error can come from a model quota, from the spend-rate limit or from the billing cap, which our guide to Google AI Studio rate limits and 429 errors explains limit by limit.

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HOW TO START PAYING FOR THE GEMINI API IN GOOGLE AI STUDIO.

The upgrade consists of linking the project to a Cloud Billing account and, on prepaid accounts, buying credits. Google offers two billing modes. With prepay, credits are bought before usage, the minimum purchase is $5, the maximum prepaid balance is $5,000, and unused credits expire after 12 months and are non-refundable. With postpay, the Cloud Billing account accrues costs and is charged at the end of the month.

Project-level spend caps exist in addition to the tier caps, but Google labels them experimental. A practical setup for a new production project is to start in prepay with a small credit balance, compare the actual token usage with the estimate for a few days, and only then raise the balance or switch to postpay. Our separate guide to Google AI Studio billing, prepaid credits and caps covers the account settings in more detail.

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FREE TIER VERSUS PAID TIER: DATA USE AND REGIONAL RULES.

The Gemini API Additional Terms of Service treat the two tiers differently. On the unpaid services, Google may use submitted content to provide, improve and develop its products, human reviewers may read, annotate and process API input and output after the data is disconnected from the account, and Google tells users not to submit sensitive, confidential or personal information. On the paid services, Google states that it does not use prompts or responses to improve its products and logs them for a limited period only to detect policy violations.

The terms also say that AI Studio counts as a paid service when the account has access to a Cloud project with an active billing account, so a single billed project changes the data terms for that account's AI Studio use. For users in the European Economic Area, Switzerland and the United Kingdom, the paid-service data terms apply to all services, and API clients offered to users in the EEA may use only the paid services.

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WHAT A GEMINI API WORKLOAD COSTS PER MONTH.

The first example is an offline document job that processes 10 million input tokens and produces 2 million output tokens a month, without caching or grounding. The second is a customer-support chatbot handling 20,000 requests a day for 30 days, with 3,000 input tokens and 500 output tokens per request, which adds up to 1.8 billion input tokens and 300 million output tokens a month. The arithmetic uses the official standard and Batch rates and was run in Python.

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Model and mode	Document job now	Document job after change	Chatbot now	Chatbot after change
Gemini 4 Argon, Standard	$40.00	$80.00	$6,600	$13,200
Gemini 3.8 Flash, Standard	$15.00	$30.00	$2,475	$4,950
Gemini 3.8 Flash, Batch	$7.50	$15.00	$1,237.50	$2,475
Gemini 3.5 Flash-Lite, Standard	$8.00	$8.00	$1,290	$1,290
Gemini 3.5 Flash-Lite, Batch	$4.00	$4.00	$645	$645

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For the chatbot on Gemini 3.8 Flash today, the bill is 1,800 × $0.75 for input plus 300 × $3.75 for output, or $2,475 a month, and the same traffic costs $4,950 from January 1, 2027. On Gemini 4 Argon it costs $6,600 before December 1 and $13,200 after. Gemini 3.5 Flash-Lite keeps the same chatbot at $1,290 a month, about half the current Flash bill and about a quarter of the Flash bill after the January increase, which is why the choice of model weighs far more on the invoice than any AI Studio setting.

The chatbot volumes also exceed the $250 cap of Tier 1 within days, so a new production project of that size has to reach Tier 2 or Tier 3, which requires payment history, before the traffic can run for a full month. For file sizes and context lengths that drive token counts, see our guide to Google AI Studio file upload limits and formats.

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GOOGLE AI STUDIO PRICING IN NOVEMBER 2026.

Google AI Studio has no price of its own: the interface is free, the Gemini API Free Tier is free on eligible models such as Gemini 3.8 Flash and the Flash-Lite family, and paid use is billed per token on the paid tier. The dates that change budgets in the coming weeks are fixed on the official price list, with Gemini 4 Argon doubling on December 1, 2026 and Gemini 3.8 Flash and 3.6 Flash doubling on January 1, 2027.

Google does not publish a general per-model rate-limit table, and active limits have to be read in AI Studio for each project. Anyone moving from the free tier to paid use should also account for the change in data terms, the tier caps that can pause service, and the five-dollar minimum for prepaid credits.

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