Hosted platform - verified
Modal Sandboxes
Modal Sandboxes is a hosted sandbox platform from Modal Labs, read from its own pages on October 18, 2026. Isolation: gVisor runtime. Status: GA (inferred). 4 price rows, each in Modal Sandboxes's own unit.
Vendor: Modal Labs. Docs: modal.com. Pricing: modal.com. Compare every agent sandbox
- Price rows
- 4
- Vendor claims
- 1
- Not stated
- 3
- Verified quotes
- 18
Pricing
In the provider's own unit, verbatim. Nothing is converted; the directory compares a price only with others in the same unit.
| Price | Unit, as stated | Quote and source | Notes |
|---|---|---|---|
| $0.00003942 | per physical core per second (Sandbox rate; 1 physical core = 2 vCPU equivalent)Directory block: Per physical core-second | “0.00003942/ core / sec” | Minimum 0.125 cores per container. |
| $0.00000667 | per GiB memory per second (Sandbox rate)Directory block: Per GiB-second | “0.00000667/ GiB / sec” | - |
| Standard GPU rates | GPU on Sandboxes billed at standard resource ratesDirectory block: No rate of its own | “GPU See standard pricing” | - |
| $0.04 | per GiB network egressDirectory block: Per GiB | “Network Egress$0.040.04/ GiB” | Starter includes 1 TiB/month free egress. Platform-wide Listed on Modal's general pricing page; unlike its CPU and memory rows it is not labelled a Sandbox rate, so it is the platform-wide egress price. |
- Free tier or credits
Starter plan: $30/month free credits, applies to Sandboxes
“$30 / month free credits”
modal.com
Limits, lifecycle and isolation
- Max session duration
Default 5 minutes, configurable up to 24 hours
“Sandboxes have a default maximum lifetime of 5 minutes. You can change this by passing a timeout of up to 24 hours”
modal.com - Idle timeout and auto-pause
Optional idle_timeout parameter
“Sandboxes can also be automatically terminated after a period of inactivity - you can do this by setting the idle_timeout parameter.”
modal.com - Persistence and snapshots
Filesystem snapshots to carry state beyond 24 hours
“If you need a Sandbox to run for more than 24 hours, we recommend using Filesystem Snapshots to preserve its state”
modal.com - Isolation
gVisor runtime
“gVisor, a container runtime developed by Google, provides strong isolation and is suitable for most workloads.”
modal.com VM runtime with own Linux kernel
“VMs run the Sandbox in a virtual machine with its own Linux kernel.”
modal.com - CPU and memory limits
- Not stated
Note: Minimum request stated (0.125 cores, 128 MiB); no Sandbox maximum stated in checked pages.
- GPU
GPU Sandboxes supported on the gVisor runtime only
“GPU Sandboxes are only supported with runtime”
modal.com - Egress controls
Outbound open by default
“By default, Sandboxes can make outbound connections to any public IP address.”
modal.com Full block, CIDR allowlist, domain allowlist (beta)
“Modal provides three levels of outbound network restriction:”
modal.com - SDKs and languages
Python, JavaScript, Go (code-sample tabs on the Sandboxes guide)
“PythonPython (async)JavaScriptGo”
modal.com - Regions
Region selection available at 1.15-1.75x base prices
“Region selection · 1.15 - 1.75x base prices”
modal.com - Open source
- Not stated
Note: Not stated in checked pages.
- Self-host or BYOC
- Not stated
Note: Not stated in checked pages.
- Status
GA (inferred from published Sandbox pricing)inferred
“Modal Sandbox + Notebooks pricing”
Status inferred from - modal.com
Vendor-stated, not measured
Startup and resume claims
Containers spin up and down in 1-2 seconds (platform-wide claim, not Sandbox-specific)Vendor-stated
“Modal spins containers up and down in 1-2 seconds.”
modal.com
Other facts
Minimum request per container
“Each container has a minimum request of 128 MiB of memory and 0.125 CPU cores”
modal.com
FAQ
How much does Modal Sandboxes cost?
$0.00003942 per physical core per second (Sandbox rate; 1 physical core = 2 vCPU equivalent); $0.00000667 per GiB memory per second (Sandbox rate); Standard GPU rates GPU on Sandboxes billed at standard resource rates; $0.04 per GiB network egress. Prices are in the provider's own units as of October 18, 2026. Free tier: Starter plan: $30/month free credits, applies to Sandboxes.
What isolation does Modal Sandboxes use?
gVisor runtime; VM runtime with own Linux kernel.
How long can a session run on Modal Sandboxes?
Default 5 minutes, configurable up to 24 hours. Idle behavior: Optional idle_timeout parameter.
Does Modal Sandboxes restrict outbound network access?
Outbound open by default; Full block, CIDR allowlist, domain allowlist (beta).
Sources
Last verified from each provider's own docs, pricing pages and repositories; every quote was string-matched against the page that day. Not a benchmark: prices are in the provider's own unit and change without notice, so check the linked source before you commit.
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