Google recently issued an official notice to developers, announcing updates to Google AI Studio’s usage tiers (Usage Tiers) and introducing new billing account tier cap rules for Gemini API. The new system will take effect in phases on March 16 and April 1, 2026. The following are the rule changes and implementation schedule officially announced by Google: 1. Project-level spending cap selection (from March 16, 2026) The system has introduced the “project-level spending cap” setting function: Mechanism: Developers can set spending goals for a single project. If the project expenditure exceeds the set value, the system will wait for about 10…
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