Mistral AI dated the model release October 6, 2026. The documentation marks it as a Public Preview under Open v26.10. Its model identifier is mistral-large-4. Mistral positions it as a general-purpose multimodal model with open weights and a granular Mixture-of-Experts architecture.

The model has 49B active parameters out of 1.05T total parameters. Its vision encoder contains 1.6B parameters. The context window reaches 1M tokens.

Mistral opens Large 4 for public preview
Image: Hacker News (AI, ≥100 P.) ↗

The API supports Structured Outputs, Function Calling, Document QnA, Prefix, and Chat Completions through /v1/chat/completions and /v1/conversations. Batching uses /v1/batch. Agents & Conversations and Built-In Tools use /v1/agents and /v1/conversations.

The page lists prices of $1.36 per million input tokens, $0.14 for cached input, and $4.18 for output. It also displays a second set of figures: $0.68, $0.07, and $2.09 for the same three categories.