Tier 3 uses on-demand Firecracker microVMs, has no stated pool size, targets under 2 seconds P99 latency, provides VM-level isolation, and is intended for ML training, GPU workloads, and system dependencies.

| Tier 3 | On-demand Firecracker microVM | N/A | <2s | VM-level | ML training, GPU workloads, system dependencies |

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

### Three-Tier Execution Model

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Tier 3

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md