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Modal

Agent sandboxes

Serverless compute platform whose Sandboxes run untrusted or agent-written code in gVisor or VM containers, billed per second for the larger of requested and used CPU and memory.

Operated by Modal Labs, Inc. modal.com Status: active[1] Checked 31 Oct 2026

Agent sandboxes

Modal Sandboxes

Compare Agent sandboxes
Price
$0.142 /core (2 vCPU)-h
+ $0.024 per GB-hour
1-hour session
≥ $0.238
2 vCPU / 4 GB · rank 21 of 26
Fleet month
≥ $2,094
50 × 8 h × 22 days
Billed on
Running time
per second
Isolation
gVisor
sessions up to 24 h

Plans

Modal Sandboxes: plans
PlanPriceIncludes
StarterFree[1]$30/month free compute, 3 seats, 100 containers + 10 GPU concurrency, 1 TiB/month egress
Team$250 /month[1]$100/month free compute, unlimited seats, 5,000 containers + 50 GPU concurrency, 10 TiB/month egress, static IP proxy
Enterpriseunknown[1]Custom pricing with volume-based discountsCustom concurrency, 100 TiB/month egress, SSO, audit logs, HIPAA

Prices

Modal Sandboxes: prices per resource
ResourcePricePer hour
per core (2 vCPU)$0.0000394 /s[1]$0.142
per GB of memory$0.00000667 /s[1]$0.024
  • The CPU rate is per physical core, which Modal equates to 2 vCPU; the memory rate is per GiB.
  • Sandbox rates are the non-preemptible rates (3x the Function list price); billing is max(request, actual) per second.
  • Pinning a region multiplies the price by 1.15x (broad, e.g. us) or 1.75x (narrow, e.g. us-west).
  • GPU Sandboxes use the standard GPU rates per second: B300 $0.001972, B200 $0.001736, H200 $0.001261, H100 $0.001097, RTX PRO 6000 $0.000842, A100 80 GB $0.000694, A100 40 GB $0.000583, L40S $0.000542, A10 $0.000306, L4 $0.000222, T4 $0.000164; GPU Sandboxes can be preempted.
  • Volumes cost $0.09 per GiB a month with 1 TiB a month free.
  • Filesystem snapshots are kept 30 days by default (configurable); memory snapshots are alpha and expire after 7 days.
  • The under-one-second start is Modal's own claim.

Terms

Billing

Payment
Metered: usage billed afterwards[2]
Plan minimum
None[2]
Billing increment
Per second[2]
Minimum charge
unknown[2]No minimum billed duration on the pricing page or the Sandbox docs
Per-job fee
None[2]

Runtime

Billed on
Running time[2]
Isolation
gVisor[2]
Max session
24 h[2]
Concurrent sandboxes
100[2]
Largest vCPU
unknown[2]Docs say a maximum CPU request is enforced at creation but do not state it; the default soft CPU limit is 16.125 physical cores
Largest memory
unknown[2]Docs say a maximum memory request is enforced at creation but do not state it

Lifecycle

Survives a stop
Nothing (ephemeral)[4]
Snapshots
Yes[4]
Pause and resume
No[4]
Fork
Disk copy[4]
Compute billed while stopped
unknown[4]No paused or stopped state exists; a running idle Sandbox still bills max(request, actual), at least 0.125 cores and 128 MiB
Auto-stop
after 5 min[4]
Start time (vendor claim)
1 s[4]

Capabilities

GPU
Yes[5]
Desktop
None[5]
Coding agents installed
None[5]
Agent prompt API
No[5]
SSH
Yes[5]
Docker inside
Yes[5]
SDKs
Python, TypeScript, Go[5]
SOC 2
Yes[5]

Storage and network

Disk included
512 GB[1]
Extra disk
Free[1]
Snapshot storage
unknown[1]Snapshots are stored as Images; no storage price for Images is published
Egress
$0.04 per GB[1]

Platform

Regions
us, eu, ap, uk, ca, me, sa, af, mx[3]
Your cloud (BYOC)
unknown[3]No bring-your-own-cloud offer on the pricing, Sandbox or security pages
Self-host
No[3]

Free allowance

Minutes a month
None[1]
Credit a month
$30[1]
One-time credit
None[1]

Sources

  1. 1 modal.com/pricing · 31 Oct 2026
  2. 2 modal.com/products/sandboxes · 31 Oct 2026
  3. 3 modal.com/docs/guide/region-selection · 31 Oct 2026
  4. 4 modal.com/docs/guide/sandboxes · 31 Oct 2026
  5. 5 modal.com/docs/guide/security · 31 Oct 2026

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