Mistral Medium 3.5 launches with 256k context; Vibe remote coding agents debut

Mistral AI released Mistral Medium 3.5, a 128B dense model with 256k context combining instruction-following, reasoning, and coding, under a modified MIT license with open weights. Alongside it, the company introduced 'Vibe' remote coding agents — asynchronous cloud agents launchable from CLI or Le Chat that persist while users step away.