Google Gemini 4 Carbon developer access begins
Google announced developer access to Gemini 4 Carbon on November 10, 2026. It also announced a gradual rollout to Google AI Ultra subscribers, but did not specify when the rollout would be complete for each service in Korea.
Google said developers could start building with Gemini 4 Carbon on November 10, 2026.
It is rolling out to Google AI Ultra subscribers through Google Antigravity, the Gemini app, and AI Mode in Search.
Google's help documentation says Ultra members get the highest usage limits for Carbon in Android Studio.
The MKA Climb WSR score published by Artificial Analysis for Gemini 4 Carbon (High) is 54%.
The rollout completion timeline for each service in Korea and the actual RPM and TPM limits for each account have not been confirmed.
Google has announced that Gemini 4 Carbon is available to developers. The announcement is dated November 10, 2026. Developers can build with this model starting on the announcement date. Google is also rolling it out to Google AI Ultra subscribers.
This article checked Google's announcements and help documentation as of November 11, 2026.
You can start developing with Gemini 4 Carbon
Google said developers can now build with Carbon. This is an announcement of availability, not a preview of a future release. Google highlighted the model's cybersecurity performance and ability to handle long-running tasks. These are the company's descriptions in the Google developer announcement.
The rollout to Ultra subscribers has no specified completion date for Korea
Google said the rollout covers all Google AI Ultra subscribers. The services included are Google Antigravity, the Gemini app, and AI Mode in Search. The Google model announcement describes a gradual rollout. It does not specify when the rollout will finish for each service in Korea.
Users and environments | Confirmed availability | What to check separately
Developers | Can build with Carbon starting on the announcement date | Access methods and terms of use for Korean accounts
Google Antigravity, the Gemini app, and AI Mode in Search for Ultra subscribers | Gradual rollout to all subscribers | Whether it has rolled out to the account in each service
Android Studio for Ultra members | Highest usage limits for Carbon listed as a benefit | The limits that apply to the actual account
Android Studio usage limits must be checked in your account
Google's help documentation lists the highest usage limits for Carbon in Android Studio as a benefit for Ultra members. This description alone is not enough to calculate the usage allowance for each account. Actual limits must be checked in the information provided for the account you will use. This benefit is listed in Google One Help.
· Check pricing on the official pricing page for the service you intend to use.
· RPM means requests per minute.
· TPM means tokens processed per minute.
· Carbon's actual RPM and TPM figures for individual accounts have not been confirmed.
Carbon High scores 54% in an independent evaluation
The MKA Climb WSR score published by Artificial Analysis is 54%. The evaluated model is listed as Gemini 4 Carbon (High). This is an independent evaluation result, distinct from Google's own performance descriptions. The figure is published on Artificial Analysis's MKA evaluation page.
This score applies to the named evaluation and model configuration. There is no basis for generalizing it as a success rate across all tasks. It was not presented as a measure of performance on Korean-language tasks or in individual development environments.
The exact release time and transition schedule for existing models are unspecified
The body of the announcement does not specify an exact release time or time zone. The announcement date therefore cannot be converted into an actual availability start time in Korea. No retirement or automatic transition schedule for existing models has been confirmed either.
Unconfirmed item | Caution when interpreting
Exact release time and time zone | The announcement date alone cannot establish when availability began in Korea
Rollout completion time for each service in Korea | The gradual rollout announcement does not mean all Korean accounts have access
Actual RPM and TPM limits for each account | Throughput cannot be calculated from the description of the highest usage limits alone
Retirement and automatic transition schedule for existing models | Carbon's release alone does not establish when existing models will be replaced
What to check before using or paying for Carbon in Korea
In Korea, first check Carbon's availability for the service and account you plan to use. The verified portions of the announcement alone do not establish the terms for using the Gemini API in Korea. Regional support for Google AI Studio and model-specific access conditions for Carbon must also be considered separately.
· Check whether Carbon is available to your account in the service you intend to use.
· If you use the API, check the official developer documentation for support in Korea and model access conditions.
· Before paying, check the official pricing page and account-specific usage limits.
· If you are replacing an existing model, check for separate retirement or automatic transition notices.
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