How to Get a Gemma 4 API Key for Free (5 Free Routes, 2026)

How to Get a Gemma 4 API Key for Free

Updated 27 October 2026.

In short: Google's Gemma 4 is free on its own Gemini API: 14,400 requests a day, with no credit card and no paid tier. Gemma 4 is also free on OpenRouter, Ollama Cloud, Cloudflare Workers AI and NVIDIA's API catalog.

Google's own API: free, with no paid tier

Google's Gemini API pricing page lists Gemma 4 31B and Gemma 4 26B A4B with input and output free of charge, and no paid tier. The free limits are 30 requests a minute, 16,000 tokens a minute and 14,400 requests a day per model. A key comes from Google AI Studio: how to get a Gemini API key for free shows each step.

Where Gemma models are free

Where	Gemma model	Free allowance	What it needs
Google Gemini API	`gemma-4-31b-it`, `gemma-4-26b-a4b-it`	14,400 requests a day, 30 a minute	A free Google account; no card
OpenRouter	`google/gemma-4-31b-it:free`, `google/gemma-4-26b-a4b-it:free`	50 requests a day	A free account
Ollama Cloud	`gemma4:31b`	A starter amount each month, shared	A free account
Cloudflare Workers AI	`@cf/google/gemma-4-26b-a4b-it`	Inside the 10,000 free Neurons a day	A free Cloudflare account
NVIDIA (build.nvidia.com)	`google/gemma-4-31b-it`	Up to 40 requests a minute, no daily limit stated	Phone verification, not offered in every country

Gemma 4 31B answered on a free Ollama key on 26 October 2026. The full list of free AI APIs, with each limit and source, is on how to get AI API keys for free.

Use a free Gemma model in an app made for OpenAI

In the app, enter the service's key, its base URL and its Gemma model name:

Service	Base URL	Model name
Gemini API	`https://generativelanguage.googleapis.com/v1beta/openai/`	`gemma-4-31b-it`
OpenRouter	`https://openrouter.ai/api/v1`	`google/gemma-4-31b-it:free`
Ollama Cloud	`https://ollama.com/v1`	`gemma4:31b`
Cloudflare Workers AI	`https://api.cloudflare.com/client/v4/accounts/YOUR_ACCOUNT_ID/ai/v1`	`@cf/google/gemma-4-26b-a4b-it`
NVIDIA	`https://integrate.api.nvidia.com/v1`	`google/gemma-4-31b-it`

To put several free keys behind one address on your own computer, the open-source OmniRoute gateway switches to the next key when one runs out.

Words to know

API key: the password an app uses to call a model. See what is an API key.
Gemma 4: Google's open-weight model family; 31B is the larger model, 26B A4B a mixture-of-experts model with 4B active parameters.
Base URL: the address an app sends its requests to.
Token: a piece of a word; the unit models read and write. See tokens and context windows.

Frequently asked questions

Is the Gemma 4 API free?+

Yes. On Google's Gemini API, Gemma 4 31B and 26B A4B are free of charge with no paid tier: 14,400 requests a day and 30 a minute per model, with no credit card.

How do I get a Gemma 4 API key?+

Create a free key in Google AI Studio; the same key works for Gemini and Gemma models. Use the model name gemma-4-31b-it.

Where else is Gemma 4 free?+

On OpenRouter (google/gemma-4-31b-it:free, 50 requests a day), Ollama Cloud (gemma4:31b), Cloudflare Workers AI (@cf/google/gemma-4-26b-a4b-it) and NVIDIA build.nvidia.com (google/gemma-4-31b-it).

What is the Gemma 4 base URL?+

On the Gemini API, https://generativelanguage.googleapis.com/v1beta/openai/ with a Google AI Studio key and the model name gemma-4-31b-it.