Mistral AI opened a public preview of Mistral Large 4 on October 6, 2026. The documentation tags the model mistral-large-4 and marks the release Openv26.10. It is an open-weight, general-purpose multimodal system built on a granular Mixture-of-Experts design, activating 52B of its 1.05T total parameters per request. A separate 1.6B-parameter encoder handles vision input.
The context window is 1M tokens. API pricing is $1.36 per million input tokens, $0.14 per million cached input tokens, and $4.18 per million output tokens.
The documented capabilities are Structured Outputs, Function Calling, Document QnA, Prefix, Chat Completions, Batching, Agents & Conversations, and Built-In Tools. The listed routes are /v1/chat/completions, /v1/conversations, /v1/batch, and /v1/agents. Structured Outputs, Function Calling, Document QnA, Prefix, and Chat Completions use /v1/chat/completions. Agents & Conversations and Built-In Tools use /v1/agents and /v1/conversations.
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