LangSmith Sandboxes vs Runtime
LangSmith Sandboxes costs $0.0576 per vCPU-hour and Runtime costs $0.025 per vCPU-hour. LangSmith Sandboxes runs Firecracker microVMs. Runtime runs Firecracker microVMs and has no session limit.
Updated
LangSmith Sandboxes
- Isolation
- Firecracker microVM
- Free tier
- Credit of 8 LSU every month
- Max session
- Not listed
Runtime
- Isolation
- Firecracker microVM
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Max session
- No limit
What is different
8 fields differ. The rest are the same or not listed.
LangSmith Sandboxes
Runtime
- vCPU, per hour
- LangSmith Sandboxes: $0.0576
- Runtime: $0.025
- RAM, per GiB-hour
- LangSmith Sandboxes: $0.01845
- Runtime: $0.0075
- Storage
- LangSmith Sandboxes: $0.000123 per GiB-hour
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Free tier
- LangSmith Sandboxes: Credit of 8 LSU every month
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Billing
- LangSmith Sandboxes: Per second
- Runtime: Active CPU time only
- Idle stop
- LangSmith Sandboxes: After 10 minutes
- Runtime: After 5 minutes
- SDKs
- LangSmith Sandboxes: Python, TypeScript
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Integrations
- LangSmith Sandboxes: LangChain, MCP
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
Full comparison
18 fields, at each provider's list price
LangSmith Sandboxeslangchain
Runtimewithruntime
Pricing
- vCPU, per hour
- LangSmith Sandboxes: $0.0576
- Runtime: $0.025
- RAM, per GiB-hour
- LangSmith Sandboxes: $0.01845
- Runtime: $0.0075
- Storage
- LangSmith Sandboxes: $0.000123 per GiB-hour
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Free tier
- LangSmith Sandboxes: Credit of 8 LSU every month
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Paid plan from
- LangSmith Sandboxes: Pay as you go
- Runtime: Pay as you go
- Billing
- LangSmith Sandboxes: Per second
- Runtime: Active CPU time only
Limits
- Max session
- LangSmith Sandboxes: Not listed
- Runtime: No limit
- Idle stop
- LangSmith Sandboxes: After 10 minutes
- Runtime: After 5 minutes
- Largest sandbox
- LangSmith Sandboxes: 16 vCPU · 64 GiB
- Runtime: 16 vCPU · 64 GiB
- Concurrent sandboxes
- LangSmith Sandboxes: Not listed
- Runtime: Up to 200
Platform
- Isolation
- LangSmith Sandboxes: Firecracker microVM
- Runtime: Firecracker microVM
- GPU
- LangSmith Sandboxes: Not listed
- Runtime: No
- Snapshots
- LangSmith Sandboxes:
- Runtime:
- Pause and resume
- LangSmith Sandboxes:
- Runtime:
Developer
- SDKs
- LangSmith Sandboxes: Python, TypeScript
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Integrations
- LangSmith Sandboxes: LangChain, MCP
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
Trust
- License
- LangSmith Sandboxes: Not listed
- Runtime: Not listed
- BYOC
- LangSmith Sandboxes: Enterprise plan
- Runtime: Not listed
Hourly cost
One sandbox running for one hour
LangSmith Sandboxes
Runtime
- 1 vCPU · 2 GiB
- LangSmith Sandboxes: $0.095
- Runtime: $0.040
- 2 vCPU · 4 GiB
- LangSmith Sandboxes: $0.189
- Runtime: $0.080
- 4 vCPU · 8 GiB
- LangSmith Sandboxes: $0.378
- Runtime: $0.160
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
LangSmith Sandboxes fits when
- You need the sandboxes in your own cloud account.
- You need SOC 2 Type II, HIPAA and GDPR.
Runtime fits when
- You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK or Claude Code.
- You want the lower list price: $0.080 against $0.189 an hour for 2 vCPU and 4 GiB.
- You need a desktop in the sandbox.
- Your code waits a lot: CPU is billed only while it is in use.
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