Intro
The Gemini API provides a Free Tier that allows you to experiment and integrate AI features without any initial cost. Before using the API, it is important to understand how rate limits work and what resources are available under the Free Tier.
Rate Limits
Rate limits determine how many requests you can send to the Gemini API within a specific period. They ensure fair usage for all developers, prevent abuse, and help maintain system performance.
You can find the official rate-limit documentation here:
https://ai.google.dev/gemini-api/docs/rate-limits#free-tier
Free Tier Availability
Under the Free Tier, you can use Text-Out models with the following limits:
- Gemini 2.5 Pro (Text-Only): 50 requests per day (RPD)
This allocation is sufficient for testing, tutorials, and small development workflows. When your project grows and you require a higher volume of requests, you can upgrade to a paid tier for additional capacity.
Generating an API Key
Step 1:
Go to: https://aistudio.google.com/ and log in using your Google account by clicking on “Get Started”.
Step 2:
From the bottom left part of the page, click on “Get API key”.
Step 3:
On the next page, click “Create API key.” You will then be asked to name the key and select your Google Cloud project.
If you do not already have a project, you will need to create one before continuing.
Step 4:
To view your API key, click on the key name, then copy the value shown under “API Key.”
Set up Billing for Image Generation
For image generation or image editing actions, you must use an image-capable model (for example, Gemini 2.5 Flash Image). These image-capable models are available only on paid tiers, which means you must set up billing in your Google Cloud project.
From your API Key page, click on the “Set up Billing” button
You will then be redirected to the Google Cloud Platform to complete the billing setup. In the first step, you will need to choose your account and select your country.
In the second step, you will need to enter your contact details and payment information.
