Gemini 4 Carbon opens paid API access as Antigravity previews Swarm

Google opened paid Gemini API access to Gemini 4 Carbon on November 10. It also began rolling out Carbon in Google Antigravity alongside the /swarm preview. In Google’s example, a team of agents built a 3D browser game about a pelican riding a bike around its Mountain View campus. Carbon launch · Antigravity announcement

How Google built Pelican Campus Quest

Google says the agents modeled assets in Blender, built the game with Three.js and WebGL shaders, and combined procedural Web Audio effects with music from Lyria. The demo shows the bike, campus and on-screen controls together. Google’s example · Play the demo in AI Studio

Give each agent a part of the prototype

Enter /swarm with a task in the Antigravity App or CLI. The coordinator assigns work and collects updates on a shared board. A verifier can inspect diffs and run tests. Workers share the project workspace by default, and the coordinator can give them separate Git worktrees when they need to edit in parallel. The App’s Members pane shows which model each agent is using. Swarm guide · Model assignment demo

For a small prototype, one worker could implement bike controls, another could load the campus assets, and a verifier could check that the combined build starts and the controls respond. The site’s prototyping and playtesting sections cover those steps.

Check the plan and API price

Google AI Pro and Ultra include the Swarm preview in the Antigravity App and CLI. On Antigravity’s consumer plans, choosing Carbon requires Ultra. Google says a swarm draws down quota faster than a single conversation. Swarm availability · Carbon in Antigravity

The paid Gemini API lists introductory rates of $2 per million input tokens and $10 per million output tokens for Carbon. Google says those rates move to $4 and $20, respectively, after the introductory period ends November 30. API pricing in the launch announcement