Mistral releases Shieldstral-1.0-3B, a policy-adaptive multimodal safety classifier

Mistral AI released Shieldstral-1.0-3B, a 3B-parameter multimodal safety classifier that judges content against natural-language policies and outputs a continuous safety score.

It moderates text, image, and text-plus-image content in a single forward pass and can be retargeted to new policies at inference time without retraining.

The Apache 2.0 open-weight model is built on Ministral-3-3B-Base-2512 and trained on sequences up to 32k tokens.