Family Mistral · 128B parameters★ Made in France

Mistral Medium 3.5 128B

Dense 128B + vision, 256k ctx, configurable reasoning. SWE-Bench 77.6%. Replaces Medium 3.1 and Magistral. Released April 29, 2026.

🇫🇷 Mistral AI·License Modified MIT·Context 250k tokens·Output April 29, 2026·Fits within the 128 GB of the GIGABYTE AI TOP ATOM← Catalog

01What it can do

Strengths
  • SWE-Bench Verified 77.6%
  • τ³-Telecom 91.4%
  • 256k ctx
  • Multilingual vision (24 languages)
  • Modified MIT permissive
Limitations to know
  • —~74 GB in Q4 — 4× GPU workstation required
  • —Revenue clause for large enterprises
Architecture
Dense 128B · vision encoder · 256k ctx · configurable reasoning · integrated EAGLE draft head
Training
First flagship merged Mistral: replaces Medium 3.1, Magistral, and Devstral 2 in Le Chat / Vibe.
Ideal for
Frontier agentic codingLong-context RAGMultilingual vision

05Install

Install Ollama for your OS. Check the model and its quantization before downloading. Start with 4096 tokens of context, then check placement with ollama ps. A command below is not proof that a test was run on your machine.

$ollama run mistral-medium-3.5:128b
⚠
First download: between 2 and 40 GB depending on the selected quantization. Plan for sufficient disk space; a stable connection is recommended. Subsequent launches are instant.

02Required memory

Approximate GPU VRAM required to run this model, including 4k tokens of context overhead. For a longer context, add ~1 GB per 8k-token increment.

Q4_K_M
The lightest, ~5% loss
74 GB
Q5_K_M
Good quality/size compromise
91 GB
Q8_0
Nearly indistinguishable from FP16
137 GB
FP16
Full precision — server use
256 GB
Fallback CPU · If you don't have a GPU, allow 160 GB of RAM minimum to run this model at reduced speed.

What hardware do you need for Mistral Medium 3.5 128B?

To run Mistral Medium 3.5 128B locally with Q4 quantization, you need about 74 GB of VRAM. An option to compare: BOSGAME M5 128GB / 2TB (Ryzen AI Max+ 395) — leave some headroom for the system and context; check engine compatibility with the GPU.

Current offer: BOSGAME M5 128GB / 2TB (Ryzen AI Max+ 395)
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03Expected speed

Tokens generated per second in Q4_K_M, 4k context. Beyond 20 t/s, reading is comfortable. Below 10 t/s, that's just for testing.

Entry-level
~1t/s
GTX 1650, RX 6600, MBA M2 8GB
Mid-range
~4t/s
RTX 4060, 4070, MBP M3 Pro
High-end
~12t/s
RTX 4090, M4 Max, Radeon 7900

04Public benchmarks

Scores reproduced from model cards or MMLU-Pro / community sources. Unit: % correct answers.

SWE-Bench Verified
77.6
τ³-Telecom
91.4