From their terms of service : When you use Paid Services, including, for example, the paid quota of the Gemini API, Google doesn't use your prompts (including associated system instructions, cached content, and files such as images, videos, or documents) or responses to improve our products, and will process your prompts and responses in accordance with the Data Processing Addendum for Products Where Google is a Data Processor. For Paid Services, Google logs prompts and responses for a limited period of time, solely for the purpose of detecting violations of the Prohibited Use Policy and any required legal or regulatory disclosures. This data may be stored transiently or cached in any country in which Google or its agents maintain facilities.