Runtime
Firecracker microVM sandboxes for AI agents, billed on the CPU that code uses.
Runtime runs each sandbox in a Firecracker microVM. It costs $0.025 per vCPU-hour and $0.0075 per GiB-hour, with CPU billed only while code uses it. It includes 100 hours of a 1 GB machine in the first 30 days for free.
Updated
$0.025
vCPU per hour
$0.0075
RAM per GiB-hour
No limit
Max session
16 vCPU · 64 GiB
Largest sandbox
Runtime specifications
List prices and limits for Runtime
Pricing
withruntime- vCPU per hour
- $0.025
- RAM per GiB-hour
- $0.0075
- Storage
- $0.000119 per GiB-hour after 10 free GiB
- Billing
- Active CPU time only
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Paid plan from
- Pay as you goPrepaid credit by card, $10 to $10,000. No plan fee
Limits
withruntime- Max session
- No limitNo time limit unless you set one, from 60 seconds to 24 hours
- Idle stop
- After 5 minutesPauses after 300 seconds with no activity. Set from 1 minute to 24 hours, or off
- Sandbox size
- Up to 16 vCPU, 64 GiB2 vCPU and 4 GiB without credit. More on request
- Default size
- 2 vCPU · 4 GiB
- Concurrent sandboxes
- Up to 2004 without credit, 100 with credit, 200 with auto top-up. More on request
- Storage
- 4 GiB by default. Up to 400 GiB on a paid account, 10 GiB without credit
Platform
withruntime- Isolation
- Firecracker microVM
- GPU
- No
- Snapshots
- Keep files, memory and running processes
- Pause and resume
- Keeps memory and running processes
- Desktop
- Linux desktop driven by clicks and keys
- Regions
- 1
Developer
withruntime- SDKs
- JavaScript / TypeScript, Python, Go, Ruby, Java
- Integrations
- OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
Runtime plans
Hourly cost
Runtime next to other providers
One sandbox with 2 vCPU and 4 GiB of RAM for one hour, at list price.
Agent37 Cloud
Hugging Face Sandboxes
Krova Cloud
Zipbox
StateSet Sandbox
Lizard Sandboxes
boatRuntimeCompute only. Storage and network are not included.
Open the calculatorCompare Runtime
Alternatives to Runtime
Recent changes
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