| Family | Use |
|---|---|
| t (t3, t4g) | Burstable, general-purpose, cheap |
| m (m5, m6i, m7g) | General-purpose, balanced |
| c (c5, c6i, c7g) | Compute-optimised, CPU-heavy workloads |
| r (r5, r6i, r7g) | Memory-optimised, databases, caching |
| x (x1, x2idn) | Extra memory, in-memory databases |
| i (i3, i4i) | Storage-optimised with NVMe SSDs |
| g (g5, g6) | GPU, ML training and inference |
| p (p4, p5) | High-end GPU for ML |
g = graviton (ARM-based, cheaper). i after a letter often means Intel; a means AMD; g means graviton.