Tencent open-sources Cube Sandbox: sub-60ms cold-start runtime for AI agents
udmrzn · x · 2026-09-15
Tencent has open-sourced Cube Sandbox, an instant, concurrent, secure and lightweight sandbox runtime for AI agents.
Key specs:
- Built on RustVMM and KVM, with sub-60ms cold starts (2.5-50x faster than alternatives)
- Under 5MB memory overhead per instance (6x less memory)
- Dedicated kernel per sandbox for hardware-level isolation
- Thousands of concurrent sandboxes per node
- 100% E2B SDK compatible — swap the endpoint, zero code changes
One-click deployment lets you spin up a private AI sandbox in three steps.
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