# LangSmith Sandboxes

Official pricing: https://www.langchain.com/pricing  
Category: agent-sandbox · Isolation: vm

## Pricing regimes (raw)

- **On-demand** (resource): $0.0576/vCPU-h, $0.01845/GiB-h [burstable]

## Features

Yes: snapshots, memory snapshots, fork/clone, pause/resume, persistent disk, volumes, idle auto-stop, ≥24 h sessions, custom image (Docker or snapshot), start from your own snapshot, your own Docker/OCI image, full VM (own kernel), Docker inside, root, SSH, HTTPS preview URLs, egress allowlist, self-hosting, BYOC, SOC 2, HIPAA, SSO, Python, Node.js, credential injection, HTTP method/path egress rules, wake on request, live fork (no pause), memory fork, audit logs, EU data residency, automatic snapshots, snapshots on demand, gVisor or VM (no shared kernel), inbound access rules, firewall inside (nftables), secret proxy, secret proxy for any API, shared volumes

No: nested virtualization, browser, desktop GUI, computer-use API, browser + desktop control, anti-bot stealth, CAPTCHA solving, residential IPs, preinstalled agents, public IPv4, open internet, static egress IP, open source, GPU, arm64, Windows, macOS, live resize, MCP server, agent harness API, hosted agent API (their own agent), extra volumes

Unknown: everything else. Evidence (source + quote) per feature: https://battleships.dev/data/providers/langsmith-sandbox.json → feature_evidence

## Caveats

- Public list rates are expressed in LCU and LSU. $1.50/LCU and $1/LSU; CPU 0.0384 LCU/vCPU-h, RAM 0.0123 LCU/GiB-h, storage 0.000123 LSU/GiB-h. Credits are separate compute and storage pools, not fungible dollars.
- Storage meter scope versus retained filesystem snapshot pricing needs invoice confirmation.
- Plus concurrency and maximum sandbox size not stated on pricing page.
- ENGINE_CARD cannot apply all independent free CPU/RAM/storage/request allowances exactly. Raw regimes/worked example retain them; any engine subtotal may overstate charges or miss eligibility. Do not subtract them twice.
- Features set to null were not verified. No sandbox was purchased or tested; feature/performance statements are documentation claims. Null maximums are unknown unless a cited note explicitly states unlimited.
- A complete monthly bill requires known snapshot/egress/plan limits; do not silently treat missing ancillary charges as free.
- No SSH/desktop/browser product documented (2026-09-28); access is via SDK exec, file APIs, service URLs and TCP tunnels. A browser could be installed in a custom image, but none is provided.
- Restricted egress by default for non-Enterprise orgs: only a managed allowlist (PyPI, npm, GitHub, OpenAI, Anthropic, LangSmith, mostly HTTPS:443). Unrestricted egress needs a support-ticket exemption.
- Enterprise is invoiced annually upfront and LCUs draw down committed LangChain credits. Startups can get up to $10,000 in credits (application program).
- New organisations created manually must be on Plus. Developer is only the personal org.
- CPU bursts to 2x requested when the host has spare capacity. It is not documented whether burst CPU is billed; the billed allocation is presumably the requested vCPU.

## How this provider charges


As of 2026-09-28. Prices are USD unless explicitly labelled otherwise. Source type: official published list/promo or unknown, never a fabricated quote.

Public list rates are expressed in LCU and LSU. $1.50/LCU and $1/LSU; CPU 0.0384 LCU/vCPU-h, RAM 0.0123 LCU/GiB-h, storage 0.000123 LSU/GiB-h. Credits are separate compute and storage pools, not fungible dollars.

| Regime | When it applies | How billed / numbers | Source |
|---|---|---|---|
| Developer | One free seat, max 10 sandboxes | No fee; separate included 5 LCU / 1 LSU sandbox allowances. | https://www.langchain.com/pricing |
| Plus | 50-concurrent example requires paid quota confirmation | $39/seat/month; same sandbox resource rates. | https://www.langchain.com/pricing |
| Enterprise | Self-host/hybrid/custom quotas | Sales quote plus own infrastructure where applicable. | https://www.langchain.com/pricing |

## Gotchas

- Public list rates are expressed in LCU and LSU. $1.50/LCU and $1/LSU; CPU 0.0384 LCU/vCPU-h, RAM 0.0123 LCU/GiB-h, storage 0.000123 LSU/GiB-h. Credits are separate compute and storage pools, not fungible dollars.
- Storage meter scope versus retained filesystem snapshot pricing needs invoice confirmation.
- Plus concurrency and maximum sandbox size not stated on pricing page.
- ENGINE_CARD cannot apply all independent free CPU/RAM/storage/request allowances exactly. Raw regimes/worked example retain them; any engine subtotal may overstate charges or miss eligibility. Do not subtract them twice.
- Features set to null were not verified. No sandbox was purchased or tested; feature/performance statements are documentation claims. Null maximums are unknown unless a cited note explicitly states unlimited.
- A complete monthly bill requires known snapshot/egress/plan limits; do not silently treat missing ancillary charges as free.

## Worked workload

4 vCPU / 8 GiB; 50 simultaneous instances × 8 h/day × 22 days = **8,800 instance-hours**, **35,200 vCPU-hours**, **70,400 GiB-hours**. At 30% observed CPU:10,560 active-vCPU-hours only where the meter actually uses utilization. Assume one start/instance/day:1,100starts. Retain50GiB snapshots for a month;100GiB outbound. Active disk capacity was not specified.

Before allowances and plan: 35,200×$0.0576 + 70,400×$0.01845 = $3,326.40. Plus one seat adds $39. Compute allowance subtracts $7.50 → $3,357.90 before storage/egress. A 50 GiB storage meter held 730h costs $4.4895 less $1 storage allowance = $3.4895, but snapshot applicability is unverified. Developer 10-sandbox cap cannot serve C=50; Plus quota needs confirmation.

## Sources

- https://www.langchain.com/pricing
- https://docs.langchain.com/langsmith/sandboxes
- https://docs.langchain.com/langsmith/sandbox-snapshots
- https://docs.langchain.com/langsmith/sandbox-mounts
- https://docs.langchain.com/langsmith/sandbox-auth-proxy