Tencent Releases Cube Sandbox: Sub-60ms VM Runtime for AI Agents

Tencent has open-sourced Cube Sandbox — a lightweight VM runtime for AI agent infrastructure built on RustVMM and KVM, with cold starts under 60ms, memory under 5MB per instance, and E2B SDK compatibility.

1 min read|agenticonsult Intelligence

Tencent Releases Cube Sandbox: Sub-60ms VM Runtime for AI Agents

Tencent has open-sourced Cube Sandbox — a lightweight VM runtime for AI agent execution environments built on RustVMM and KVM. Each sandbox instance runs its own kernel with cold starts under 60ms and memory under 5MB, enabling thousands of parallel sandboxes on a single node. The runtime is E2B SDK compatible, meaning existing E2B-based workflows can swap the endpoint without a migration. Released on GitHub under TencentCloud.

Why It Matters

Sub-60ms sandboxed kernel execution at 5MB per instance closes the cost and latency gap between containerized and VM-isolated agent runtimes — the critical tradeoff for high-throughput agentic workloads.

Primary source

TencentCloud / GitHub

#tencent #cube-sandbox #agent-infrastructure #vm-runtime #open-source

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