Head-to-head · Mistral
Magistral Small vs Devstral 2 123B
Magistral Small needs ~16 GB at Q4_K_M; Devstral 2 123B needs ~73.3 GB. That ~57.3 GB gap decides which hardware runs each; they differ on 3 of the 11 devices below.
Which devices run each
A representative spread across the memory range. Tap a verdict for the full breakdown.
Size at each quantization
* derived from bits-per-weight; unstarred sizes are measured GGUF files.
Bottom line
The larger Devstral 2 123B needs ~73.3 GB; Magistral Small runs on lighter hardware at ~16 GB with more headroom and faster responses. Check each against your exact device: what runs Magistral Small · what runs Devstral 2 123B.
More Mistral comparisons
FAQ
What is the difference in memory between Magistral Small and Devstral 2 123B?
At Q4_K_M, Magistral Small needs about 16 GB and Devstral 2 123B needs about 73.3 GB, a difference of ~57.3 GB.
Should I run Magistral Small or Devstral 2 123B?
Run Devstral 2 123B if your hardware has the ~73.3 GB it needs and you want maximum quality; run Magistral Small (~16 GB) for lighter hardware, faster responses, and more memory headroom.
Full breakdowns: Magistral Small · Devstral 2 123B · all models × devices.
Sources
Memory figures are estimates at Q4_K_M, validated 2026-09-07. See methodology.