CoreWeave Sandboxes vs Runtime

CoreWeave Sandboxes costs $0.128 per vCPU-hour and Runtime costs $0.025 per vCPU-hour. CoreWeave Sandboxes runs microVMs, offers GPUs and limits a session to 720 hours. Runtime runs Firecracker microVMs and has no session limit.

Updated

CoreWeave Sandboxes

Isolation
MicroVM
Free tier
Not listed
Max session
720 hours

Runtime

Isolation
Firecracker microVM
Free tier
100 hours of a 1 GB machine in the first 30 days
Max session
No limit

What is different

10 fields differ. The rest are the same or not listed.

CoreWeave Sandboxes
Runtime
vCPU, per hour
CoreWeave Sandboxes: $0.128
Runtime: $0.025
RAM, per GiB-hour
CoreWeave Sandboxes: $0.0212
Runtime: $0.0075
Storage
CoreWeave Sandboxes: Snapshots and volumes billed separately
Runtime: $0.000119 per GiB-hour after 10 free GiB
Billing
CoreWeave Sandboxes: Per second
Runtime: Active CPU time only
Max session
CoreWeave Sandboxes: 720 hours
Runtime: No limit
Concurrent sandboxes
CoreWeave Sandboxes: Up to 2,000
Runtime: Up to 200
Isolation
CoreWeave Sandboxes: MicroVM
Runtime: Firecracker microVM
GPU
CoreWeave Sandboxes:
Runtime: No
SDKs
CoreWeave Sandboxes: Python, TypeScript
Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations
CoreWeave Sandboxes: Claude Code
Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
CoreWeave Sandboxes: $0.128
Runtime: $0.025
RAM, per GiB-hour
CoreWeave Sandboxes: $0.0212
Runtime: $0.0075
Storage
CoreWeave Sandboxes: Snapshots and volumes billed separately
Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier
CoreWeave Sandboxes: Not listed
Runtime: 100 hours of a 1 GB machine in the first 30 days
Paid plan from
CoreWeave Sandboxes: Not listed
Runtime: Pay as you go
Billing
CoreWeave Sandboxes: Per second
Runtime: Active CPU time only

Limits

Max session
CoreWeave Sandboxes: 720 hours
Runtime: No limit
Idle stop
CoreWeave Sandboxes: Not listed
Runtime: After 5 minutes
Largest sandbox
CoreWeave Sandboxes: Not listed
Runtime: 16 vCPU · 64 GiB
Concurrent sandboxes
CoreWeave Sandboxes: Up to 2,000
Runtime: Up to 200

Platform

Isolation
CoreWeave Sandboxes: MicroVM
Runtime: Firecracker microVM
GPU
CoreWeave Sandboxes:
Runtime: No
Snapshots
CoreWeave Sandboxes:
Runtime:
Pause and resume
CoreWeave Sandboxes: Not listed
Runtime:

Developer

SDKs
CoreWeave Sandboxes: Python, TypeScript
Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations
CoreWeave Sandboxes: Claude Code
Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code

Trust

License
CoreWeave Sandboxes: Not listed
Runtime: Not listed
BYOC
CoreWeave Sandboxes: Your CKS clusters. CoreWeave runs the gateway.
Runtime: Not listed

Hourly cost

One sandbox running for one hour

CoreWeave Sandboxes
Runtime
1 vCPU · 2 GiB
CoreWeave Sandboxes: $0.170
Runtime: $0.040
2 vCPU · 4 GiB
CoreWeave Sandboxes: $0.341
Runtime: $0.080
4 vCPU · 8 GiB
CoreWeave Sandboxes: $0.682
Runtime: $0.160

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

CoreWeave Sandboxes fits when

  • You need GPUs.
  • You need the sandboxes in your own cloud account.

Runtime fits when

  • A session must run longer than 720 hours.
  • You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK, LangChain or MCP.
  • You want the lower list price: $0.080 against $0.341 an hour for 2 vCPU and 4 GiB.
  • You need pause and resume.

More comparisons

See all comparisons

Related