Written by Jakub Rusinowski · Last updated August 15, 2026
Yes, comfortably — you'll have ~53.7 GB of headroom running Devstral-2 123B at Q4_K_M (74.26125 GB, ~9 tok/s (est.)) with room for up to 64K context.
or compare on Vast.ai from $0.77/hr (typical low · varies)
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| VRAM | 128 GB |
| Memory Bandwidth | 273 GB/s |
| Quant | VRAM needed | Fits 128 GB? | Max context |
|---|---|---|---|
| F16 | 248.2 GB | ✗ No | — |
| Q8_0 | 132.9 GB | ✗ No | — |
| Q6_K | 103.1 GB | ✓ Yes | 64K |
| Q5_K_M | 89.4 GB | ✓ Yes | 64K |
| Q4_K_M | 76.5 GB | ✓ Yes | 64K |
| Q3_K_M | 54.7 GB | ✓ Yes | 64K |
| Q2_K | 42.7 GB | ✓ Yes | 64K |
VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 128 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
| Devstral-2 123B | Q4_K_M · 74.26125 GB · ~9 tok/s (est.) |
| Devstral Small 24B | Q4_K_M · 14.49 GB · ~15 tok/s (est.) |
| Devstral-2 22B | Q4_K_M · 13.2825 GB · ~16 tok/s (est.) |
At 2 hrs/day, buying (~$4,699) beats renting at $0.77/hr after about 8.5 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Yes, comfortably — you'll have ~53.7 GB of headroom running Devstral-2 123B at Q4_K_M (74.26125 GB, ~9 tok/s (est.)) with room for up to 64K context.
Devstral-2 123B at Q4_K_M quantization (74.26125 GB), estimated ~9 tokens/sec, up to 64K context.
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