Remote agents in Vibe. Powered by Mistral Medium 3.5.
Original: Mistral Medium 3.5
Mistral launches Medium 3.5, powering Vibe remote coding agents and Le Chat Work mode.
Mistral Medium 3.5 is a 128B dense flagship model with a 256k context window, combining instruction-following, reasoning, and coding. It becomes the default model for Le Chat and Mistral Vibe, enabling cloud-based remote coding agents launched from the CLI or chat. The release also adds Le Chat Work mode for multi-step, cross-tool workflows with visible actions and approval gates for sensitive operations.
This official Mistral AI product post introduces Mistral Medium 3.5, and how it powers Mistral Vibe's remote agents and Le Chat's new Work mode. The company positions Mistral Medium 3.5 as its new flagship merged model: a 128B dense model with a 256k context window that puts instruction-following, reasoning, and coding into a single set of weights, released with open weights under a modified MIT license. Mistral says the model can adjust its reasoning effort on a per-request basis, handling both fast chat and longer agentic workflows; its vision encoder was trained from scratch to support images of varying sizes and aspect ratios. The company also lists some benchmark scores, such as 77.6% on SWE-Bench Verified and 91.4 on τ³-Telecom.
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