Mistral Medium 3.5

In non-nerd speak

Who makes it: Mistral AI. The files come from the maker's own Hugging Face account.

License: Mistral Modified MIT License. Mistral's own version of the MIT license. You can use, change, and share it, even to make money, unless your company is big.

Business use: Only if your company (or your employer) made 20 million US dollars or less last month. Bigger companies need a paid deal with Mistral.

Training data: We have not found a full public data release. Not yet checked in depth.

Will it say no?

Not sure yet. The maker's card does not say how often it says no. So we won't guess.

This comes from what the maker wrote, checked Oct 19, 2026. We have not run our own tests yet. It sits next to the trust score and does not change it. How we pick these labels.

Will it run on my computer?

Pick a computer with at least 128 GB of memory. On a Mac, that is the unified memory. On a PC, a graphics card with that much VRAM is fastest. A PC with only normal RAM will also work, just slower.

Not sure? Use our pick-by-computer guide.

How to run it in LM Studio

1. Get LM Studio from lmstudio.ai and open it.
2. Open the Discover tab. Search for unsloth/Mistral-Medium-3.5-128B-GGUF.
3. Pick a file that ends in Q4_K_M. It is the best mix of size and quality for most people.
4. Click Download. When it is done, open a new chat and load the model.

The files are GGUF builds that LM Studio can load. We checked that this repo exists on Oct 29, 2026. Full LM Studio guide.

How to use it with Hermes

Does it fit? Yes. Its memory window is big enough for Hermes.

1. Load the model in LM Studio. Set the context length to at least 64000.
2. In LM Studio, open the Developer tab and start the server.
3. In a terminal, run hermes model. Choose LM Studio and press Enter to keep http://localhost:1234/v1.
4. Pick this model from the list. Then run hermes to start.

Steps based on the Hermes docs. Full Hermes guide.

Common questions

Is Mistral Medium 3.5 truly open source?

No, open weights with custom rules. Mistral's own version of the MIT license. You can use, change, and share it, even to make money, unless your company is big.

Can I use Mistral Medium 3.5 for my business?

Only if your company (or your employer) made 20 million US dollars or less last month. Bigger companies need a paid deal with Mistral.

Do I need to sign up to download Mistral Medium 3.5?

No. Download without an account.

How much memory does Mistral Medium 3.5 need?

Our estimate is about 94 GB of RAM for a 4-bit file of about 76.6 GB. This is a rough guide, not a test.

Similar models to compare

Same maker first, then models that need about the same memory.

Where Mistral Medium 3.5 shows up

• Other models that fit a 128 GB computer
• What its license means

Change history

• Oct 19, 2026 New model Mistral Medium 3.5: Added Mistral Medium 3.5, a dense 128 billion parameter model that reads images. Modified MIT license: no rights for companies over $20M a month in revenue.

All changes on the site

Sources we checked

If the maker's page and this page disagree, trust the maker. Tell us what we got wrong.