The model weights for Mistral Medium 3.5 are released under a Modified MIT license, which governs the terms under which the weights may be used, copied, modified, and redistributed.
This analysis describes what Mistral AI's agreement states, permits, or reserves. It does not constitute a legal determination about enforceability. Regulatory applicability and practical outcomes may vary by jurisdiction, enforcement context, and individual circumstances. Read our methodology
A Modified MIT license governs what users may legally do with the model weights, including use, modification, and redistribution, subject to whatever modifications the MIT baseline carries.
Interpretive note: The excerpt confirms the license name and open-weights release but does not specify which terms differ from standard MIT. The material differences introduced by the 'Modified' qualifier cannot be stated without reviewing the actual license text, which is not provided.
The updated model card reflects new pricing for mistral-medium-3-5: the token cost has increased from €1.25 per million tokens (€6.4 per million on a higher tier) to $1.5 per million tokens ($7.5 on a higher tier). The pricing currency has shifted from EUR to USD as the primary denomination. Organizations using this model through Mistral AI's API will encounter higher per-token costs at current exchange rates. No opt-out mechanism is available; the new pricing applies to all API consumption of this model.
View change record →Under this provision, users and organizations accessing the open-weights release are bound by the terms of the Modified MIT license rather than a standard MIT license. The specific modifications to the license terms determine permissible commercial, redistribution, and derivative use of the model weights.
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"Released as open weights under a Modified MIT license.Excerpt from Mistral AI's Mistral Medium 3.5 Model Card
(1) REGULATORY LANDSCAPE: Open-weights releases of general-purpose AI models engage the EU AI Act's transparency and documentation obligations for model providers; the license terms do not themselves address EU AI Act compliance, which may require …
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A Modified MIT license governs what users may legally do with the model weights, including use, modification, and redistribution, subject to whatever modifications the MIT baseline carries.
Under this provision, users and organizations accessing the open-weights release are bound by the terms of the Modified MIT license rather than a standard MIT license. The specific modifications to the license terms determine permissible commercial, redistribution, and derivative use of the model weights.
ConductAtlas has identified this type of provision across 257 platforms. See the full comparison.
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