Sources: as Google prepares to roll out its Gemini 4 Argon, staff are testing a new version internally named Carbon; one staffer says it "feels like Opus 5.5" (Hugh Langley/Business Insider)
As Google prepares to roll out its new Gemini 4 ‘Argon’ model to the public, staff inside the company are testing better versions …
Google is testing a new version of its Gemini 4 model, internally named Carbon. According to Business Insider, one employee said that Carbon "feels like Opus 5.5" for coding, referring to Anthropic's most powerful model for long-term agentic coding. This new version is being tested as Google prepares to roll out its Gemini 4 Argon model to the public.
The company is moving quickly with its new generation of Gemini 4 models, which were announced in late September. Google is competing in the fast-moving race for AI coding agents, with Anthropic and OpenAI having pulled ahead among developers with models built for complex engineering work.
Google's internal testing shows the company's efforts to improve its AI models. The new Carbon model was made available inside Google's internal coding platform, Jetski, in recent days.
Brief written by urgent.news from Techmeme, Business Insider, TechSpot, TechRadar, Android Authority — 5 reports on this story. Machine-written — may contain errors; check the original before relying on it.
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