Amazon Bedrock AgentCore Runtime vs Mosaic Sandbox

Amazon Bedrock AgentCore Runtime costs $0.0895 per vCPU-hour and Mosaic Sandbox costs $0.025 per vCPU-hour. Amazon Bedrock AgentCore Runtime runs microVMs and limits a session to 8 hours. Mosaic Sandbox runs Firecracker microVMs.

Updated Oct 23, 2026

Amazon Bedrock AgentCore Runtime

Hosts AI agents on AWS and runs each user session in its own microVM.

Isolation: MicroVM
Free tier: Not listed
Max session: 8 hours

Visit site Amazon Bedrock AgentCore Runtime profile

Mosaic Sandbox

Linux microVM sandboxes for coding agents.

Isolation: Firecracker microVM
Free tier: Not listed
Max session: Not listed

Visit site Mosaic Sandbox profile

What is different

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

Field

Amazon Bedrock AgentCore Runtime

Mosaic Sandbox

vCPU, per hour: Amazon Bedrock AgentCore Runtime: $0.0895; Mosaic Sandbox: $0.025
RAM, per GiB-hour: Amazon Bedrock AgentCore Runtime: $0.00945; Mosaic Sandbox: Included
Storage: Amazon Bedrock AgentCore Runtime: Session storage is free during preview. Code storage is billed at Amazon ECR or S3 rates; Mosaic Sandbox: Free
Billing: Amazon Bedrock AgentCore Runtime: Active CPU time only; Mosaic Sandbox: Bundled machine time
Largest sandbox: Amazon Bedrock AgentCore Runtime: 2 vCPU · 8 GiB; Mosaic Sandbox: 16 vCPU · 32 GiB
Concurrent sandboxes: Amazon Bedrock AgentCore Runtime: Up to 5,000; Mosaic Sandbox: Up to 200
Isolation: Amazon Bedrock AgentCore Runtime: MicroVM; Mosaic Sandbox: Firecracker microVM
SDKs: Amazon Bedrock AgentCore Runtime: Python, TypeScript; Mosaic Sandbox: Python, TypeScript, Go
Integrations: Amazon Bedrock AgentCore Runtime: Claude Agent SDK, LangChain, MCP, OpenAI Agents SDK; Mosaic Sandbox: LangChain, MCP, Claude Code, Vercel AI SDK

Full comparison

18 fields, at each provider's list price

Amazon Bedrock AgentCore Runtimeaws.amazon.com/bedrock/agentcore/pricingaws.amazon.com

Mosaic Sandboxsandbox.mosaicos.com/pricingsandbox.mosaicos.com

Pricing

vCPU, per hour: Amazon Bedrock AgentCore Runtime: $0.0895; Mosaic Sandbox: $0.025
RAM, per GiB-hour: Amazon Bedrock AgentCore Runtime: $0.00945; Mosaic Sandbox: Included
Storage: Amazon Bedrock AgentCore Runtime: Session storage is free during preview. Code storage is billed at Amazon ECR or S3 rates; Mosaic Sandbox: Free
Free tier: Amazon Bedrock AgentCore Runtime: Not listed; Mosaic Sandbox: Not listed
Paid plan from: Amazon Bedrock AgentCore Runtime: Pay as you go; Mosaic Sandbox: Pay as you go
Billing: Amazon Bedrock AgentCore Runtime: Active CPU time only; Mosaic Sandbox: Bundled machine time

Limits

Max session: Amazon Bedrock AgentCore Runtime: 8 hours; Mosaic Sandbox: Not listed
Idle stop: Amazon Bedrock AgentCore Runtime: After 15 minutes; Mosaic Sandbox: Not listed
Largest sandbox: Amazon Bedrock AgentCore Runtime: 2 vCPU · 8 GiB; Mosaic Sandbox: 16 vCPU · 32 GiB
Concurrent sandboxes: Amazon Bedrock AgentCore Runtime: Up to 5,000; Mosaic Sandbox: Up to 200

Platform

Isolation: Amazon Bedrock AgentCore Runtime: MicroVM; Mosaic Sandbox: Firecracker microVM
GPU: Amazon Bedrock AgentCore Runtime: Not listed; Mosaic Sandbox: No
Snapshots: Amazon Bedrock AgentCore Runtime: Not listed; Mosaic Sandbox:
Pause and resume: Amazon Bedrock AgentCore Runtime:; Mosaic Sandbox:

Developer

SDKs: Amazon Bedrock AgentCore Runtime: Python, TypeScript; Mosaic Sandbox: Python, TypeScript, Go
Integrations: Amazon Bedrock AgentCore Runtime: Claude Agent SDK, LangChain, MCP, OpenAI Agents SDK; Mosaic Sandbox: LangChain, MCP, Claude Code, Vercel AI SDK

Trust

License: Amazon Bedrock AgentCore Runtime: Not listed; Mosaic Sandbox: Not listed
BYOC: Amazon Bedrock AgentCore Runtime: Not listed; Mosaic Sandbox: Not listed

Hourly cost

One sandbox running for one hour

Size

Amazon Bedrock AgentCore Runtime

Mosaic Sandbox

1 vCPU · 2 GiB: Amazon Bedrock AgentCore Runtime: $0.108; Mosaic Sandbox: $0.025
2 vCPU · 4 GiB: Amazon Bedrock AgentCore Runtime: $0.217; Mosaic Sandbox: $0.050
4 vCPU · 8 GiB: Amazon Bedrock AgentCore Runtime: $0.434; Mosaic Sandbox: $0.100

Compute only, at list rates.

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Which one fits

Based on the fields above

Amazon Bedrock AgentCore Runtime fits when

You use the Claude Agent SDK or the OpenAI Agents SDK.
Your code waits a lot: CPU is billed only while it is in use.
You need SOC 2, HIPAA and ISO 27001.

Mosaic Sandbox fits when

You use Claude Code or the Vercel AI SDK.
You want the lower list price: $0.050 against $0.217 an hour for 2 vCPU and 4 GiB.
You need snapshots.
You need a sandbox larger than 2 vCPU · 8 GiB.

More comparisons

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Amazon Bedrock AgentCore Runtime

Mosaic Sandbox

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Amazon Bedrock AgentCore Runtime fits when

Mosaic Sandbox fits when

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