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Ever see "for everyone" in an AI launch, open the app, and not find it?
That's Gemini 4 Hydrogen on a free Google account.
Google released it on November 12.
It's the new everyday Gemini model, the step up from Gemini 3.8 Flash.
Google says it finishes tasks 2.5 times faster and makes up facts more than 5 times less often. (Those are Google's numbers. I haven't timed it myself.)
It's rolling out in Google Search for everyone.
But in the Gemini app it's a different story.
On a free account, you can't pick it.
Which is a strange way to say "for everyone", if you ask me.
A setting called Auto picks the model for you, and Google's own help page says most prompts go to Flash-Lite, the quick, light one.
(If you pay for Google AI Plus, Pro or Ultra, Hydrogen is in your model menu. You can skip to the prompt.)
Right after this: the one setting free users need to leave on, how to see which model answered you, where you can pick Hydrogen by name for free, and the catch that comes with it.
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Right. Back to it.
Leave Auto on
On a free account, Auto is the only way your prompts reach Hydrogen.
So if you turn it off, every answer comes from Flash-Lite.
On your computer, go to gemini.google.com.
Bottom left, click Settings → Usage limits.
At the bottom, make sure auto model selection is on.
See which model answered you
Open a chat.
Under an answer, click More → Show thinking steps.
Scroll to the bottom. Gemini names the model it used.
I'd try it on a quick question and then on a long, messy one.
It's the only way to know what Auto actually gave you.
Pick Hydrogen by name, for free
Google AI Studio.
It's Google's workspace for people building with its models, but you don't need to write a line of code to use it.
And Hydrogen is on its free tier, with rate limits.
Go to aistudio.google.com and sign in with your Google account.
Choose Gemini 4 Hydrogen in the model menu.
Open Run settings and pick a thinking level. High is the default. Low answers faster.
Paste your prompt and run it.
If you're on the free plan, I think this is honestly the better way to use Gemini right now.
Because you choose the model, and you don't get routed to the light one.
The prompt to test it with
Google says Hydrogen flags missing details instead of guessing.
So give it a draft with gaps and see if it admits them:
Here's a draft I wrote for [a product page / a post / a short guide].
Rewrite it so a stranger understands it on the first read.
Rules:
- Keep my words where they work. Only change what's unclear.
- Keep it under [150] words.
- Sound like me: [three words, e.g. plain, warm, direct].
- If you had to guess at anything, list it at the end. Don't fill gaps with made-up facts.
[paste your draft]Run it once on Low and once on High.
If you can't tell the two apart, keep Low, because it's faster.
The catch
The free tier costs you something else.
Google's terms say what you type into AI Studio for free can be used to improve its products, and human reviewers may read it.
The same terms say it plainly: don't submit sensitive, confidential or personal information.
So I'd keep it really simple: no client emails, contracts, health questions or anything with a real person's name in it.
But your own drafts and public pages are fine.
Make it stick
I'd pick one job you do every week that isn't private. A post, a product description, the outline of a guide.
Do it in AI Studio on Hydrogen next time, with the prompt above.
Keep that tab pinned. That's the whole habit.
A smarter model still doesn't know you.
Hydrogen this week, another model next month.
Every time you switch, you explain yourself from scratch: who you are, what you sell, how you write.
And it still sends back something that sounds like nobody.
Overpowered is the complete AI system I run my business on. It knows you, writes like you, works with any AI and gets better the more you use it.
It's $29 a month.
Talk tomorrow,
Zephyr
P.S. Which one won on your draft, Low or High? Hit reply and tell me. I want to know how often Low is enough.