Mistral Small 4
Mistral AI · March 2026
● activeOpen Weightdecoder onlymultimodalAPI Available
Description
A compact multimodal model that can understand both text and images while excelling at reasoning and coding tasks. Open-weight and designed for efficiency — delivers frontier-level performance relative to its small size, making it ideal for cost-sensitive deployments and on-device applications.
Notable Milestones
- ▸High performance-per-parameter for cost-efficient deployment
- ▸Open-weight multimodal reasoning and vision
Key Innovations
Multimodal
MultimodalProcessing multiple types of input (text, images, audio, video) in a single model.
Open Weight
Open WeightModel weights are publicly released but training data/code may not be. Enables fine-tuning but not full reproduction.
Reasoning
ReasoningStructured step-by-step problem solving, often using chain-of-thought or tree-of-thought approaches.