Mistral's April 2026 release of Medium 3.5 as a 128B multimodal model optimized for agents, coding, and reasoning established it as the current line leader, with no general Medium 3.6 or higher checkpoint shipped since. The October 6, 2026, public preview of the much larger Mistral Large 4 (1T parameters, MoE architecture, 1M context) now anchors trader focus, as the company prioritizes frontier open-weight performance in cybersecurity, finance, and multilingual tasks while retiring or consolidating prior variants. This five-month gap in Medium updates, combined with specialized releases like Leanstral and safety models, signals a deliberate cadence favoring capability consolidation over rapid iteration. Key near-term catalysts include Large 4 weights expected by late October and any signals on the next unified Medium checkpoint amid competition from Chinese open models and U.S. labs.