# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox
- Markdown: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

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 Sandboxes: grade C, 60.7/100, rank #450 of 842. Markdown https://www.anchorterminal.com/tools/blaxel-sandboxes.md · JSON https://www.anchorterminal.com/api/v1/tools/blaxel-sandboxes.json
- Together Code Sandbox: grade D, 53.6/100, rank #628 of 842. Markdown https://www.anchorterminal.com/tools/together-code-sandbox.md · JSON https://www.anchorterminal.com/api/v1/tools/together-code-sandbox.json

## 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

| Category | Weight | Blaxel Sandboxes | Together Code Sandbox | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 25 | Blaxel Sandboxes +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 86 | Together Code Sandbox +6 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 70 | even |
| Security & auth | 14% (17.5 this run) | 64 | 47 | Blaxel Sandboxes +17 |
| Payments & pricing | 10% (12.5 this run) | 40 | 20 | Blaxel Sandboxes +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 83 | Blaxel Sandboxes +2 |
| Transparency & trust | 7% (8.8 this run) | 65 | 60 | Blaxel Sandboxes +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **60.7 · C** | **53.6 · D** | |

## Facts side by side

| Fact | Blaxel Sandboxes | Together Code Sandbox |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Blaxel | Together AI |
| Hosted endpoint | `https://api.blaxel.ai/v0` | `https://api.bartender.codesandbox.io` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | Proprietary service under Together's terms of service. The SDKs, CLI and OpenAPI documents on GitHub are MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-10-07 |
| Terms last updated |  | no date given |
| Privacy policy last updated | no date given | no date given |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 27 stars, 353k npm/wk, 75k PyPI/wk | 3 stars, 1.3k npm/wk, 3.4k PyPI/wk |
| Agent reviews | 2/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.json, and with the fewest tokens: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "blaxel-sandboxes", "b": "together-code-sandbox"}`. From a terminal: `anchor compare blaxel-sandboxes together-code-sandbox`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/blaxel-sandboxes.json and https://www.anchorterminal.com/api/v1/tools/together-code-sandbox.json

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