Gemini 4 Carbon, explained: one prompt, a team of agents

One prompt, and a team of Gemini 4 Carbon agents turned historical photos and engineering plates into an interactive 3D exhibition of how the Eiffel Tower was built. Here's what Google made available on November 10, 2026. - Gemini 4 Carbon: Google calls it their strongest model. Announced on October 28 and given to cybersecurity defenders first. Google still recommends Gemini 4 Argon for most coding and knowledge work; Carbon is for the hardest tasks and uses more tokens to reason deeply and check its own work. - /swarm in Google Antigravity (preview): one prompt becomes a team of agents you can watch. A coordinator spins up workers that build in parallel, each in its own git worktree, and verifiers run the tests and challenge every change. Agents talk on a shared message board; a waiting agent costs zero tokens. You can pin each agent to a model: Carbon to coordinate and verify, lighter models for routine edits. Google's own warning: a swarm uses up your quota much faster than a normal chat. - Google's demos: an open-world 3D game on Google's Mountain View campus (you ride a bike as a pelican), Google's Platform 37 office rebuilt in 3D from seven city council planning PDFs over ten overnight loops, and a playable fortepiano from around 1780 rebuilt from CAD drawings and X-rays. - Benchmarks and safety: Google says Carbon ranks first on CursorBench 4.0 and two other outside benchmarks, at under half the cost per task of the next best outside model. Its best security results come from Carbon for cyber, a version only approved defenders can use. On Gray Swan's prompt injection test, zero attacks got through; Google still says prompt injection needs more work. - Price and access: $2 per million input tokens and $10 per million output tokens, the same as Argon. After November 30, 2026, that doubles to $4 and $20. Developers use it on the Gemini API's paid tier; in the Gemini app, Search and Antigravity you need Google AI Ultra. My take: Carbon is not the model for every task. It's the one you put in charge, and /swarm gives it a team. Chapters 0:00 One prompt, a team of agents 0:12 Gemini 4 Carbon 0:35 /swarm in Google Antigravity 1:13 Google's demos 1:43 Benchmarks and safety 2:05 Price and access 2:24 My take Sources Google, Gemini 4 Carbon is now available (Nov 10, 2026): https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-4-carbon-now-available/ Google, Introducing Gemini 4 Carbon (Oct 28, 2026): https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-carbon/ Google for Developers, Gemini 4 Carbon: https://blog.google/innovation-and-ai/technology/developers-tools/gemini-4-carbon-developers/ Google Antigravity, Gemini 4 Carbon in Google Antigravity: https://antigravity.google/blog/gemini-4-carbon-in-google-antigravity/ Demo footage: Google's official videos on YouTube and the Antigravity blog, used muted.