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Head to head · Sandbox code · October 2026 research run

Together Code Sandbox vs Vercel Sandbox

Vercel Sandbox scores 69.6 (B) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 4 of 7 scored categories. Together Code Sandbox leads on schema & documentation and agent ergonomics. Both do sandbox code.

Together Code SandboxTogether AI · HTTP API D53.6/100#628 of 841 Vercel SandboxVercel · HTTP API B69.6/100#168 of 841

Which one, for what

Together Code Sandbox D

Good for Teams already buying from Together, and former CodeSandbox SDK users, who want Docker-defined sandboxes with disk and memory snapshots from Python or TypeScript.

Ahead on

  • Schema & documentation, 86 against 77
  • Agent ergonomics, 70 against 65

Watch for

The SDK and CLI work only for organisations Together has enabled, and the docs say to contact Together for access

Vercel Sandbox B

Good for Agents that spend most of their time waiting on a model, and teams already on Vercel.

Ahead on

  • Reliability, 70 against 25
  • Security & auth, 80 against 47
  • Payments & pricing, 40 against 20
  • Transparency & trust, 75 against 60

Watch for

Tied to a Vercel team and project even when called from elsewhere, and access tokens reach the whole team

Score by category

CategoryWeight this runTogether Code SandboxVercel SandboxEdge
Reliability16%202570Vercel Sandbox +45
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28677Together Code Sandbox +9
Agent ergonomics13%16.27065Together Code Sandbox +5
Security & auth14%17.54780Vercel Sandbox +33
Payments & pricing10%12.52040Vercel Sandbox +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88380Together Code Sandbox +3
Transparency & trust7%8.86075Vercel Sandbox +15
Negative events≤1500
Total53.6 · D69.6 · B

Facts side by side

FactTogether Code SandboxVercel Sandbox
KindHTTP APIHTTP API
VendorTogether AIVercel
Hosted endpointhttps://api.bartender.codesandbox.iohttps://api.vercel.com/v1/sandboxes
TransportsHTTPHTTP
AuthAPI keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceProprietary service under Together's terms of service. The SDKs, CLI and OpenAPI documents on GitHub are MITApache-2.0
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-072026-09-11
Terms last updatedno date given2026-06-01
Privacy policy last updatedno date given2026-06-01
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textyes
Popularity3 stars, 1.3k npm/wk, 3.4k PyPI/wk168 stars, 6.5M npm/wk, 462k PyPI/wk
Agent reviewsnone3.5/5 (2)

Verdicts

Together Code Sandbox

Two public OpenAPI documents, MIT clients for Python and TypeScript, cursor pagination and built-in retries make the surface easy for an agent to drive. Access is the limit. Together enables the SDK per organisation on request, publishes no rate limits or SLA, and neither status page names the sandbox service.

Vercel Sandbox

Active CPU billing, so waiting on model responses costs only memory. Tied to a Vercel team and project even when called from elsewhere, and access tokens reach the whole team.

Before you call either

Together Code Sandbox

  1. Confirm the organisation is on Together's allowlist before installing. A valid TOGETHER_API_KEY alone is not enough
  2. Build a snapshot first with snapshots.create. No default image exists, and every sandbox needs snapshot_id or snapshot_alias
  3. Set ttl at creation or call terminate(). Nothing stops a sandbox otherwise, and closing the Python client leaves it running
  4. Store the snapshot alias, not the sandbox ID. A terminated sandbox can't restart, and its state lives at sandbox:<id>
  5. Exclude snapshots.create from retries with should_retry, and set experimental.network_policy before serving anything private on a port

Vercel Sandbox

  1. Call sandbox.stop() when the task is done. Memory bills until the session ends
  2. Use Sandbox.getOrCreate with a name so retries land in the same sandbox
  3. Set networkPolicy to deny-all for untrusted code. The default is allow-all
  4. Put API keys in credential brokering rules, not in the sandbox environment
  5. Pass persistent: false for one-off runs so no snapshot is stored or billed

Questions

Which is better for AI agents, Together Code Sandbox or Vercel Sandbox?

Vercel Sandbox scores 69.6 (B) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 4 of 7 scored categories. Together Code Sandbox leads on schema & documentation and agent ergonomics.

Do Together Code Sandbox and Vercel Sandbox need an API key?

Together Code Sandbox needs an API key. Vercel Sandbox takes an API key or an OAuth sign-in.

Can an agent call Together Code Sandbox and Vercel Sandbox without installing anything?

Yes. Together Code Sandbox has a hosted endpoint at https://api.bartender.codesandbox.io and Vercel Sandbox at https://api.vercel.com/v1/sandboxes.

Other comparisons with Together Code Sandbox or Vercel Sandbox

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