Shieldstral 1.0
Mistral's 3B open-weight, policy-adaptive safety classifier for text and image moderation.
Overview
Shieldstral 1.0, released August 4, 2026, is a 3-billion-parameter open-weight multimodal safety classifier that judges text and images against moderation policies written in plain language at inference time, rather than fixed categories. Mistral says it matches or beats open guard models up to 7x its size on text safety and sets a new state of the art on multimodal moderation, running on a single 16GB GPU.
This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.
Key features
- 3B parameters, runs on one 16GB GPU
- Policy-adaptive: takes a moderation policy as plain-language input
- Multimodal (text + image) safety scoring
- Covers 12 languages
Use cases
- On-device content moderation
- Agent guardrails with a custom safety policy
Pricing
Apache 2.0, weights free on Hugging Face.
Pricing reflects the source record and may change. Confirm current terms with the provider.
Dates and sources
- Released
- 4 Aug 2026
- Record updated
- 23 Sept 2026
- Record last checked
- 23 Sept 2026