Following the preview at the end of last month, Google is now bringing its latest Gemini 4 Carbon model to the Gemini app.

AI Ultra subscribers can now access Carbon in the Gemini app, AI Mode, and Antigravity. Notably, Argon (AI Pro and up) will remain available alongside the new model.

Officially, Google says “Argon remains the ideal choice for the majority of software engineering and knowledge work, while Carbon is built for tasks that test the limits of a model’s intelligence.” Examples include “complex, multi-step coding and debugging and open-ended scientific research and discovery.”

In the model picker, 4 Argon is for “Code & analysis” and 4 Carbon is for “Most complex work.” Notably, the Gemini app has removed 3.1 Pro with this launch.