Mistral Medium 3.5

Parameters

128B

Published

Apr 29, 2026

Mistral Medium 3.5 is an AI model developed by Mistral AI (France), first published in April 2026. It works in the language and multimodal domain, on tasks such as question answering and language modeling/generation.

Epoch AI has no training-compute estimate for this model. The model has 128,000,000,000 parameters.

Access: Open weights (restricted use). Its weights are openly available. Epoch AI rates the confidence of this record as confident.

Full record

Organization: Mistral AI
Country of organization: France
Domain: Language, Multimodal
Task: Question answering, Language modeling/generation
Parameters: 128,000,000,000
Model accessibility: Open weights (restricted use)
Open weights: Yes
Epoch confidence: Confident