Gemini 4 Hydrogen Is Live on Scholarly

Google has released Gemini 4 Hydrogen, the new Flash model in the Gemini 4 family, and we are replacing Gemini 3.8 Flash with it in Scholarly. Your PDFs, notes, recordings, and other sources stay at the center of the work. Hydrogen is another way to turn that material into something you can study, present, or share.

Where you can use Hydrogen

Select Gemini 4 Hydrogen in the model menu of these creators on a paid plan:

• Deep Research, for a cited report built from your sources and the web.
• AI Slides and document creators, for a deck, study guide, or report from a chapter or a set of notes.
• Infographics, for one visual summary of a process or argument.
• Flashcards, where Hydrogen is now a recommended choice.
• Podcasts, for a script you can listen to on the way to class or work.
• AI Profiles, to save Hydrogen as the model a profile uses.

Available choices follow the creator and your plan, and a team's model policy can further limit the catalog. Hydrogen does not replace Auto or Best, so you can keep using your usual default. It is not offered in AI Chat or video lectures.

What changes from Gemini 3.8 Flash

Google describes Hydrogen as a fast model for agentic, multi-step work, adapted from Gemini 4 Carbon. Its launch post reports more than five times fewer fabricated claims than Gemini 3.8 Flash in Google's own testing. For work that has to stay true to your source, that is the change we care about most.

Hydrogen always reasons before it writes, so a creation can take a little longer than it did on Gemini 3.8 Flash. Choose a source you know well and check the result against the original material.

If you previously saved Gemini 3.8 Flash as your model choice, that selection now opens as Gemini 4 Hydrogen. Your saved creations remain in place.

Gemini 3 Flash and Gemini 2.5 Flash also leave the model menus today. A saved choice of either one returns to Auto for that creator, and nothing you made with them changes.

What it costs

Hydrogen keeps Gemini 3.8 Flash's 1 AI Creation Credit base cost. The creator shows the total before you start. For podcasts, the usual length additions apply: 1 extra credit for a result over 15 minutes, or 2 extra credits over 30 minutes.

See AI models and Plans and Limits for the current rules.

Try it with your own material

1. Open the flashcard creator, or any creator listed above, and add your source.
2. Choose Gemini 4 Hydrogen in the model menu.
3. Check the credit total, choose your settings, and create.

A good first test is a chapter you have already studied. Make a flashcard deck with Hydrogen, then check a few cards against the page they came from.