Mistral Medium 3.5 Developer Guide: API, Remote Agents & Pricing 2026
Mistral Medium 3.5 is a 128B open-weight dense model with 77.6% SWE-Bench Verified and a 256K context window, released April 29, 2026 under a modified MIT license. It ships with Vibe remote coding agents that run asynchronously in the cloud and a new Work Mode in Le Chat for parallel multi-step agentic task execution.