Technology · AI

Google’s Gemini 4 Hydrogen Is Free, but You Can’t Always Pick It

Google has launched Gemini 4 Hydrogen, a new model available to free Gemini users. It scores 51 on the Artificial Analysis Intelligence Index, one point above Gemini 4 Argon. Google decides when it runs, and manual selection may need a subscription.

By Alistair Sterling

November 15, 20262 min read

Google's Gemini 4 Hydrogen Is Free, but You Can't Always Pick It — Google’s Gemini 4 Hydrogen Is Free, but You Can’t Always Pick It

Google has launched Gemini 4 Hydrogen, a new AI model that free users of its Gemini chatbot can reach without paying. The catch: free users may not be able to choose it themselves.

Google says Hydrogen is faster, more accurate and better at following instructions than earlier models. On the Artificial Analysis Intelligence Index, an independent benchmark, it scored 51 at its default high reasoning setting. Google's pricier Gemini 4 Argon scored 50.

Free access, with limits

Unlike Google's most powerful Gemini models, Hydrogen is open to free users. But without a subscription, you won't necessarily be able to select it manually.

Instead, Google's automatic model selection decides when Hydrogen suits a given request. Free users get the model, but Google picks the moments.

What Google says has improved

Google says Hydrogen handles complicated requests better. It also says the model works with information across different apps and produces useful results without endless follow-up prompts.

The company claims the model cuts fabricated information by more than fivefold compared with Gemini 3.8 Flash. That figure comes from Google's own evaluations, not an outside test.

Three everyday uses

The first is working through dense documents. Google says Hydrogen can process PDFs, spreadsheets, charts and other complicated material, then pull the relevant details into organized reports and summaries. A long insurance policy, school handbook or appliance manual are examples. Users can ask follow-up questions without re-explaining the document.

The second is writing. Google says the model is significantly better at following detailed instructions about tone, length, formatting and style. The key is giving Gemini specific rules about what you want and what you don't, such as a word limit or a ban on corporate jargon.

The third ties Hydrogen to Google Workspace. Google says the model is better at connecting information from uploaded files, Gmail, Google Drive and supported connected apps, including Dropbox and Airtable.

You must connect the relevant apps and give Gemini permission to access them first. Access to individual integrations and actions can also depend on your account and subscription.

With those permissions in place, you could ask Gemini to piece together information from several sources and turn it into an actionable plan. Examples include organizing a busy family schedule or gathering material for a project.