`Mistral Medium 3.5 128B` Launches as a Unified Flagship Model
Mistral Medium 3.5 128B is presented as a new flagship dense model that unifies instruct, reasoning, coding, and vision in one model, with a 256k context window and configurable reasoning_effort. For indie developers, the biggest takeaways are the broad capability coverage and the Modified MIT License, which appears friendly to commercial use for smaller teams but includes exceptions for high-revenue companies.
Mistral Medium 3.5 128Bis described as a dense 128B flagship model replacingMistral Medium 3.1,Magistral, andDevstral 2in prior product slots.- The model combines text and image input, function calling, JSON output, multilingual support, and a 256k context window in one package.
reasoning_effortcan be set per request, letting indie developers trade off speed versus stronger reasoning for coding or agent workflows.- The
Modified MIT Licenseis a practical point for indies: commercial use seems allowed, but larger-revenue companies may face extra restrictions.