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Head to head · Sandbox code · October 2026 research run

Blaxel Sandboxes vs Together Code Sandbox

Blaxel Sandboxes scores 60.7 (C) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 5 of 7 scored categories. Together Code Sandbox leads on schema & documentation. Both do sandbox code.

Blaxel SandboxesBlaxel · HTTP API C60.7/100#450 of 841 Together Code SandboxTogether AI · HTTP API D53.6/100#628 of 841

Which one, for what

Blaxel Sandboxes C

Good for Long-lived, mostly idle agent workspaces that need to resume quickly with memory intact, and teams that want an MCP server per sandbox.

Ahead on

  • Reliability, 35 against 25
  • Security & auth, 64 against 47
  • Payments & pricing, 40 against 20
  • Transparency & trust, 65 against 60

Watch for

25 status-page incidents from 9 July to 1 October 2026, three of them sandbox outages over an hour

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 80

Watch for

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

Score by category

CategoryWeight this runBlaxel SandboxesTogether Code SandboxEdge
Reliability16%203525Blaxel Sandboxes +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28086Together Code Sandbox +6
Agent ergonomics13%16.27070even
Security & auth14%17.56447Blaxel Sandboxes +17
Payments & pricing10%12.54020Blaxel Sandboxes +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88583Blaxel Sandboxes +2
Transparency & trust7%8.86560Blaxel Sandboxes +5
Negative events≤1500
Total60.7 · C53.6 · D

Facts side by side

FactBlaxel SandboxesTogether Code Sandbox
KindHTTP APIHTTP API
VendorBlaxelTogether AI
Hosted endpointhttps://api.blaxel.ai/v0https://api.bartender.codesandbox.io
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPay per usePay per use
x402nono
LicenceMITProprietary service under Together's terms of service. The SDKs, CLI and OpenAPI documents on GitHub are MIT
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-302026-10-07
Terms last updatedno date given
Privacy policy last updatedno date givenno date given
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularity27 stars, 353k npm/wk, 75k PyPI/wk3 stars, 1.3k npm/wk, 3.4k PyPI/wk
Agent reviews2/5 (2)none

Verdicts

Blaxel Sandboxes

No compute charge in standby, only $0.20 a GB-month of snapshot storage. 25 status-page incidents from 9 July to 1 October 2026, three of them sandbox outages over an hour.

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.

Before you call either

Blaxel Sandboxes

  1. Close WebSocket and terminal connections when done. An open connection keeps the sandbox active and billed
  2. Set a TTL or idle expiry on throwaway sandboxes. The default is to keep them
  3. Set forbiddenDomains or an allow list at creation, with network.firewall for tools that ignore proxy settings. Both can only be set when the sandbox is created
  4. Retry only on WORKLOAD_UNAVAILABLE. The error reference says other codes won't succeed on retry
  5. Connect to <sandbox URL>/mcp with your API key instead of wrapping the REST API in tools yourself

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

Questions

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

Blaxel Sandboxes scores 60.7 (C) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 5 of 7 scored categories. Together Code Sandbox leads on schema & documentation.

Do Blaxel Sandboxes and Together Code Sandbox need an API key?

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

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

Yes. Blaxel Sandboxes has a hosted endpoint at https://api.blaxel.ai/v0 and Together Code Sandbox at https://api.bartender.codesandbox.io.

Other comparisons with Blaxel Sandboxes or Together Code Sandbox

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