{"product":"C4 micro VMs","description":"C4 micro VMs — each runs its own kernel, with a durable filesystem and allowlisted network access. Billed per awake second, with no minimum. Sleeps automatically when idle, and billing stops when it sleeps.","kernel":"Linux 6.18","preinstalled":["Node 22","Python 3.13","git","ripgrep","build-essential"],"billing":{"unit":"awake second","minimum_seconds":1,"max_call_ms":3600000,"note":"You pay for awake seconds only. Hourly prices are a projection of that rate, not a commitment — an idle VM sleeps in 45s and bills nothing. A workspace persists indefinitely; run as many calls against it as you like, bounded by your credit balance rather than by a clock."},"sizes":[{"id":"c4-nano","name":"C4 Nano","tagline":"Scripts, API calls, and text work","vcpu":0.25,"memory_gib":1,"disk_gb":4,"usd_per_minute":0.000654,"usd_per_hour":0.039211,"usd_per_block":0.006535,"fits":["Run a script against an API","Scrape, transform, or reshape data","Scheduled jobs that finish in seconds"],"not_for":"Installing large dependency trees"},{"id":"c4-small","name":"C4 Small","tagline":"A real dev box for one task","vcpu":0.5,"memory_gib":4,"disk_gb":8,"usd_per_minute":0.001727,"usd_per_hour":0.103622,"usd_per_block":0.01727,"fits":["npm install and run a test suite","Build a small service","Try a package without touching your laptop"]},{"id":"c4-standard","name":"C4 Standard","tagline":"The default. Enough for most work","vcpu":1,"memory_gib":6,"disk_gb":12,"usd_per_minute":0.003011,"usd_per_hour":0.180634,"usd_per_block":0.030106,"fits":["Full builds and test runs","Let an AI agent work in a real Linux box","Anything you would give a laptop to"]},{"id":"c4-large","name":"C4 Large","tagline":"Four cores when the work is heavy","vcpu":4,"memory_gib":12,"disk_gb":20,"usd_per_minute":0.009358,"usd_per_hour":0.561456,"usd_per_block":0.093576,"fits":["Parallel builds and big test matrices","Data processing that saturates cores","Long-running compute jobs"]}]}