Ethan Mollick calls Gemini 4 Carbon a very good model after early access

Ethan Mollick says he had early access to Gemini 4 Carbon and calls it a very good model that improves on Argon.

He says Carbon thinks differently from Claude and GPT while remaining highly capable, with its own strengths and weaknesses. He reports that Carbon reproduced a video clip he supplied as a Three.js demo.

The report is a single post on X from Mollick, a professor who writes about AI, and does not include benchmark results or details of the access arrangement.