It's in the second paragraph of the article.

"for all tiers of Google AI Studio, the Gemini API, Gemini for business, the Gemini app, Google Search, and paid Google AI Pro and Ultra subscribers in Google Antigravity."

So which one of these six options is the one I should use?

Whichever one suits your needs.

AI studio if you want to just try it out for some code things.

API if you want it to use it as an API.

For business if you are an enterprise.

Antigravity

Or just you know - just go to Google.com and search for something. It's really not hard.

This instapost "wah I don't know how to use it wah" from anyone as soon as Google release a model is getting tiring - change the record please.

Same question as whether you should be using the latest Claude Opus model from Claude Chat, Claude App, Claude Code (via Claude Pro/Max/Ultra subscription), Claude Code (via API), Claude Platform, Claude on AWS Bedrock, Claude on Azure Foundry, Claude Managed Agents, Claude Cowork, etc?

When you call it through OpenRouter you're using the API.

You know how Claude Code is like a little program that your computer can run which lets you talk to Claude? Well Gemini is actually really similar! If that's more your speed, you should use Antigravity.

But if all of this is feeling really overwhelming and you just want something simple, I would recommend just Googling it! Hydrogen will be the one generating the response :)