
Magistral
The first reasoning model by Mistral AI

Open safety reasoning models with custom safety policies
gpt-oss-safeguard is a new family of open-source safety models (120b & 20b) from OpenAI. They use reasoning to classify content based on a custom, developer-provided policy at inference time, providing an explainable chain-of-thought for each decision.
gpt-oss-safeguard has been live since October 30, 2025 (7 months ago). It operates in the Open Source, Artificial Intelligence (AI), and Development sectors. As a growing startup, it has accumulated 118 votes and 1 comment to date.
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