Mistral Medium 3.1 was introduced by Mistral AI in mid-2025 as a frontier-class multimodal model designed to improve conversational tone and overall performance. It processes both text and image inputs while generating text responses, making it suitable for workflows that blend visual and linguistic understanding. The model supports a 128k token context window, which gives it room to handle long documents, multi-turn conversations, and retrieval-augmented tasks without frequent truncation.

On Mistral's lifecycle it is marked as Deprecated under the Premier tier with version v25.08, with Mistral guiding new integrations toward its successor. The model supports structured outputs, function calling, predicted outputs, and document question answering, allowing teams to wire it into agentic and tool-using systems. It also handles tool use and image inputs in third-party gateways, indicating practical fit for chat assistants, vision-enabled pipelines, and enterprise applications where deprecated-but-still-served frontier behavior is acceptable.