Free Gemini API Key (2026) — Get Your Key in 1 Minute
Google AI Studio gives every developer a free Gemini API key — 4 free models with up to 2,000,000 token context. No credit card required. Updated 2026-06-14.
How to Get a Free Gemini API Key — Step by Step
- Go to Google AI Studio — aistudio.google.com — sign in with Google account.
- Click "Get API Key" in the left nav
- Create API key in a new or existing project
- Pick a Gemini model — Gemini 2.5 Flash recommended for best free limits.
- Configure OpenAI client — Base URL: https://generativelanguage.googleapis.com/v1beta
Free Gemini API Models — Compare 4 Models
| Model | Context | Max Output | Rate Limit | |
|---|---|---|---|---|
| Gemini 2.5 Pro | 2.0M | 65K | 5 RPM, 100 RPD | Get key → |
| Gemini 2.5 Flash | 1.0M | 65K | 10 RPM, 250 RPD | Get key → |
| Gemini 2.5 Flash-Lite | 1.0M | 65K | 15 RPM, 1,000 RPD | Get key → |
| Gemini 3 Flash (Preview) | 1.0M | 65K | Preview limits | Get key → |
Why Choose the Free Gemini API?
- Gemini 2.5 Flash: 1M context window
- Multimodal: text, image, audio, video
- Up to 500 RPD on Flash-Lite:
- No credit card required:
Gemini Free Tier Limitations
- 10 RPM is tight for production or multi-user apps
- Free tier prompts may be used for product improvement
- Some features (Grounding, Search) not available on free tier
Frequently Asked Questions — Free Gemini API Key
Does Google use my free tier API prompts for training?
Google's free tier terms state that prompts may be used for product improvement. If this is a concern, use the paid tier which has a no-training guarantee.
Why am I getting 429 errors on Gemini free tier?
The free tier has both per-minute (RPM) and per-day (RPD) limits. Gemini 2.5 Flash allows 15 RPM / 1,500 RPD. Flash-Lite allows 30 RPM / 1,500 RPD. Space out your requests or implement exponential backoff.
What's the difference between Google AI Studio and Vertex AI for Gemini?
Google AI Studio is the free developer playground — easier signup, no GCP project needed. Vertex AI is the enterprise platform with SLAs, VPC support, and higher rate limits. For free tier usage, stick with AI Studio.
How do I get a free Gemini API key?
Go to aistudio.google.com, sign in with your Google account, click "Get API Key" in the left sidebar, and a new key is generated instantly. No credit card required.
Is Gemini API really free?
Yes. Google AI Studio offers a permanent free tier for Gemini models. The free tier includes 4 models with rate limits ranging from 5-15 RPM and up to 250 requests per day. No credit card is needed to sign up.
Can I use Gemini API for commercial projects?
Google allows free tier usage for development and testing. For production/commercial use, Google's free tier terms state that prompts may be used for product improvement. If this is a concern, upgrade to the paid tier which has a no-training guarantee.