Gemini 4 Carbon on Hermoso: Google’s most capable: the hardest reasoning and long work

Gemini 4 Carbon is one of 24 text models Hermoso can write ad copy, hooks and scripts with. Name it, or leave the model out and the router picks a sound default. The same catalog is available from the app, the API, the MCP server and the CLI, on one account and one credit balance; the exact price of every render is shown in the app before it runs.

What people make with it

The linked formats are creative recipes Hermoso plans and renders for your brand.

About Google

Google makes Veo, Gemini Omni, Imagen and the Nano Banana image models, strong on cinematic motion and text-accurate edits.

Specs

Best for	Google’s most capable: the hardest reasoning and long work
Tier	Standard
Model id	`gemini-4-carbon`

Gemini 4 Carbon compared with other text models

Model	Maker	Tier	Best for
Gemini 4 Carbon	Google	Standard	Google’s most capable: the hardest reasoning and long work
Gemini 4 Argon	Google	Standard	Google’s efficient Gemini 4: deep reasoning, faster and leaner
Gemini 3.1 Pro	Google	Standard	Previous-generation Google reasoning
Gemini 3.8 Flash	Google	Standard	Newest Flash: fast, strong everyday work
GPT-5.6 Luna	OpenAI	Standard	Previous generation Luna
GPT-5.6 Terra	OpenAI	Standard	Previous generation Terra
GPT-5.6 Sol	OpenAI	Standard	Previous generation Sol

See all 24 text models side by side.

Just ask for it

In Claude, ChatGPT, Cursor or any assistant connected to Hermoso, name the model in plain English. Or pick it from the model menu in the app.

Write five TikTok hooks for our olive oil with Gemini 4 Carbon.

Use Gemini 4 Carbon to script a 15 second testimonial, then render it.

Have Gemini 4 Carbon rewrite this caption for LinkedIn, Instagram and X.

Getting the best out of Gemini 4 Carbon

Give the platform, the length and the count: five nine-word TikTok hooks.
Paste the product page or a real review. Specifics beat adjectives.
Ask for variants on one angle at a time (price, speed, proof) so each can be tested cleanly.
List the words you never want to see. A blocklist is respected.

Write ad copy with Gemini 4 Carbon. Start free with the full studio and up to 5 posts a month.

Start free → See pricing

Frequently asked questions

What is Gemini 4 Carbon used for in Hermoso?

Google’s most capable: the hardest reasoning and long work. It writes hooks, captions, scripts and briefs, and can drive the agent loop that plans a whole ad.