# Active-CPU-billed agent sandboxes: prices at 2 vCPU / 4 GB (Nov 2026)

Only CPU in use is billed, so idle time costs less. 8 providers: one busy 1-hour session at 2 vCPU / 4 GB costs ≥ $0.1 (Upstash Box) to ≥ $0.341 (Vercel Sandbox).

1 h busy: all CPU billed. 1 h at 10% CPU: lower only where idle CPU isn't billed. Fleet month: 50 × 8 h × 22 days, busy, on the lowest plan that runs 50 at once (its fee, less the usage it includes). At once and Starts are on the terms priced. Fixed sizes use the smallest size that fits. "≥" means a billing term is not published. Method: https://roost.guide/methodology/

| # | Provider | 1 h busy | 1 h at 10% CPU | Fleet month | Pay | At once | Starts | Size priced | Billed on | Caveats |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Upstash Box | ≥ $0.1 [1] | ≥ $0.01 | ≥ $880.00 | Pay as you go | 1,000 | ? | Small (2 vCPU / 4 GB) | Active CPU | Active-CPU billing |
| 2 | boxd | $0.15 [2] | $0.0654 | $1,320 | Prepaid credit | ? | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |
| 3 | Fly.io Sprites | ≥ $0.164 [3] | ≥ $0.0952 | ≥ $1,448 | Pay as you go | ? | 10/min, then refused | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |
| 4 | Cloudflare Sandbox | ≥ $0.18 [4] | ≥ $0.0504 | ≥ $1,589 | Pay as you go, $5/mo min | ? | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |
| 5 | Tensorlake | ≥ $0.2 [5] | ≥ $0.074 | ≥ $1,760 | Prepaid credit | 100 | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |
| 6 | AWS Bedrock AgentCore Code Interpreter | $0.217 [6] | $0.0557 | $1,908 | Pay as you go | 1,000 | 1,800/min · 108,000/h · 2,592,000/day, then refused | 2 vCPU / 4 GB | Active CPU | Active-CPU billing, Max session 8 h |
| 7 | Deno Sandbox | ≥ $0.3 [7] | ≥ $0.12 | not on published plans | Plan from $20/mo | 3 | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing, Max session 30 min |
| 8 | Vercel Sandbox | ≥ $0.341 [8] | ≥ $0.11 | ≥ $2,999 | Pay as you go, $20/mo min | 10,000 | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing, +$0.0000006 per sandbox |

Not published, so not listed here: Together Sandbox.

## Other pages

- [2 vCPU / 4 GB](https://roost.guide/agent-sandboxes/)
- [4 vCPU / 8 GB](https://roost.guide/agent-sandboxes/4-vcpu-8-gb/)
- [8 vCPU / 16 GB](https://roost.guide/agent-sandboxes/8-vcpu-16-gb/)
- [Devboxes](https://roost.guide/devboxes/)

## Filters

- [All](https://roost.guide/agent-sandboxes/)
- [Pay as you go](https://roost.guide/agent-sandboxes/pay-as-you-go/)
- [Prepaid](https://roost.guide/agent-sandboxes/prepaid/)
- [Monthly plan](https://roost.guide/agent-sandboxes/subscription/)
- [Free tier](https://roost.guide/agent-sandboxes/free-tier/)
- [100+ at once](https://roost.guide/agent-sandboxes/high-concurrency/)
- [Start limits published](https://roost.guide/agent-sandboxes/published-start-limits/)
- [No session limit](https://roost.guide/agent-sandboxes/no-session-limit/)
- [GPU](https://roost.guide/agent-sandboxes/gpu/)
- [Desktop](https://roost.guide/agent-sandboxes/desktop/)
- [Docker inside](https://roost.guide/agent-sandboxes/docker/)
- [SSH](https://roost.guide/agent-sandboxes/ssh/)
- [Snapshots](https://roost.guide/agent-sandboxes/snapshots/)
- [Fork](https://roost.guide/agent-sandboxes/fork/)
- [MicroVM](https://roost.guide/agent-sandboxes/microvm/)
- [Self-host](https://roost.guide/agent-sandboxes/self-hosted/)
- [Your cloud](https://roost.guide/agent-sandboxes/byoc/)
- [SOC 2](https://roost.guide/agent-sandboxes/soc2/)
- [Europe](https://roost.guide/agent-sandboxes/europe/)

## Sources

[1] https://upstash.com/pricing/box (checked 31 Oct 2026)
[2] https://boxd.sh/pricing/ (checked 1 Nov 2026)
[3] https://fly.io/sprites (checked 31 Oct 2026)
[4] https://developers.cloudflare.com/containers/platform/pricing/ (checked 31 Oct 2026)
[5] https://www.tensorlake.ai/pricing (checked 31 Oct 2026)
[6] https://aws.amazon.com/bedrock/agentcore/pricing/ (checked 31 Oct 2026)
[7] https://deno.com/deploy/sandbox (checked 31 Oct 2026)
[8] https://vercel.com/docs/sandbox/pricing (checked 31 Oct 2026)