Agent Sandbox vs Runtime

Runtime costs $0.025 per vCPU-hour. Agent Sandbox runs containers. Runtime runs Firecracker microVMs and has no session limit.

Updated Oct 23, 2026

Agent Sandbox

Hosted API that runs Python and shell code for AI agents.

Isolation: Container
Free tier: $10 credit with a Google sign-in
Max session: Not listed

Visit site Agent Sandbox profile

Runtime

Firecracker microVM sandboxes for AI agents, billed on the CPU that code uses.

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

Visit site Runtime profile

What is different

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

Field

Agent Sandbox

Runtime

Storage: Agent Sandbox: $0.0005/MB for output files; Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier: Agent Sandbox: $10 credit with a Google sign-in; Runtime: 100 hours of a 1 GB machine in the first 30 days
Billing: Agent Sandbox: Per second; Runtime: Active CPU time only
Isolation: Agent Sandbox: Container; Runtime: Firecracker microVM
SDKs: Agent Sandbox: Python; Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations: Agent Sandbox: 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

Agent Sandboxagentsandbox.co

Runtimewithruntime.com/pricingwithruntime.com

Pricing

vCPU, per hour: Agent Sandbox: Not listed; Runtime: $0.025
RAM, per GiB-hour: Agent Sandbox: Not listed; Runtime: $0.0075
Storage: Agent Sandbox: $0.0005/MB for output files; Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier: Agent Sandbox: $10 credit with a Google sign-in; Runtime: 100 hours of a 1 GB machine in the first 30 days
Paid plan from: Agent Sandbox: Pay as you go; Runtime: Pay as you go
Billing: Agent Sandbox: Per second; Runtime: Active CPU time only

Limits

Max session: Agent Sandbox: Not listed; Runtime: No limit
Idle stop: Agent Sandbox: After 5 minutes; Runtime: After 5 minutes
Largest sandbox: Agent Sandbox: Not listed; Runtime: 16 vCPU · 64 GiB
Concurrent sandboxes: Agent Sandbox: Not listed; Runtime: Up to 200

Platform

Isolation: Agent Sandbox: Container; Runtime: Firecracker microVM
GPU: Agent Sandbox: Not listed; Runtime: No
Snapshots: Agent Sandbox: Not listed; Runtime:
Pause and resume: Agent Sandbox: Not listed; Runtime:

Developer

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

Trust

License: Agent Sandbox: Not listed; Runtime: Not listed
BYOC: Agent Sandbox: Not listed; Runtime: Not listed

Hourly cost

One sandbox running for one hour

Size

Agent Sandbox

Runtime

1 vCPU · 2 GiB: Agent Sandbox: Not listed; Runtime: $0.040
2 vCPU · 4 GiB: Agent Sandbox: Not listed; Runtime: $0.080
4 vCPU · 8 GiB: Agent Sandbox: Not listed; Runtime: $0.160

Compute only, at list rates.

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Which one fits

Based on the fields above

Runtime fits when

You want each sandbox in its own microVM.
You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK, LangChain or MCP.
You need snapshots.
You need pause and resume.

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Agent Sandbox

Runtime

What is different

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Platform

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Trust

Hourly cost

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