Written by Jakub Rusinowski · Last updated August 15, 2026
Model library → Devstral → Devstral Small 2505 24B
The first-generation Devstral Small (release 2505), and still the local coding model with the clearest published number attached to it: 46.8% on SWE-Bench Verified, which beat the prior open-source state of the art by 6 points at release. Finetuned from Mistral Small 3.1, so it inherits the 128K context. At 24B dense it is light enough for a single RTX 4090 or a 32GB Mac (~14 GB at Q4_K_M). Apache 2.0.
Devstral Small 2505 24B needs about 15 GB of VRAM at Q4_K_M — quantized weights plus framework overhead, before any KV cache. On Apple Silicon that figure comes out of unified memory.
| Parameters | 24 Billion |
| Context window | 128,000 |
| Architecture | Dense Transformer |
| Provider | Mistral AI |
| Licence | Apache 2.0 |
| Specified at | Q4_K_M |
| System RAM | 32 GB |
| Record updated | 2026-08-15 |
Apache-2.0 — commercial use permitted. Commercial use permitted. No usage restrictions beyond attribution.
Modelled on a reference NVIDIA RTX 4090 (24 GB), at 8K context. Speed figures are ESTIMATES from the memory-bandwidth roofline described on the methodology page, not benchmarks we ran — rows marked measured come from published or reader-submitted runs. VRAM here includes the KV cache, so it reads higher than the headline figure above, which does not.
| Quant | Weights | VRAM needed | Est. speed | Fit on 24 GB |
|---|---|---|---|---|
| Q2_K | 7.9 GB | 10.0 GB | ~74 tok/s (est.) | Fits comfortably |
| Q3_K_M | 10.2 GB | 12.4 GB | ~60 tok/s (est.) | Fits comfortably |
| Q4_K_M | 14.5 GB | 16.6 GB | ~45 tok/s (est.) | Fits comfortably |
| Q5_K_M | 17.0 GB | 19.2 GB | ~39 tok/s (est.) | Fits comfortably |
| Q6_K | 19.7 GB | 21.8 GB | ~34 tok/s (est.) | Tight fit |
| Q8_0 | 25.5 GB | 27.6 GB | ~4 tok/s (est.) | Offloads to system RAM (slow) |
| F16 | 48.0 GB | 50.1 GB | ~2 tok/s (est.) | Offloads to system RAM (slow) |
Want the memory numbers alone, at every quantization level and your own context length? Use the Devstral Small 2505 24B VRAM calculator.
or compare on Vast.ai from $0.35/hr (typical low · varies)
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The cheapest catalogued GPU that runs Devstral Small 2505 24B is the AMD Radeon RX 9060 XT 16GB (16 GB).
Install Ollama, then run:
ollama run devstral:24bWeights on Hugging Face: mistralai/Devstral-Small-2505.
Quality scores as published by the model's authors or an independent evaluator — not throughput, and not measured by us.
| Benchmark | Score | Provenance |
|---|---|---|
| SWE-Bench Verified | 46.8 / 100 % | reported · https://mistral.ai/news/devstral/ |
Best for: software engineering, agentic coding, consumer gpu, local inference.
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