Anthropic’s release of Fable 5.2 — which dislodged Google’s Gemini 4 Carbon from the top spot on the Artificial Analysis Intelligence Index —. Following the preview at the end of last month, Google is now bringing its latest Gemini 4 Carbon model to the Gemini app. Google opened Gemini 4 Carbon, its most powerful model, to paying developers, businesses and AI Ultra subscribers, at Argon's $2 and $10 launch price.