# gpt-oss-safeguard technical report

DevFeed: [gpt-oss-safeguard technical report](<https://devfeed.tech/articles/gpt-oss-safeguard-technical-report-6441.md>)

Original publisher: [Read original article](<https://openai.com/index/gpt-oss-safeguard-technical-report>)

Published: 2025-10-29T00:00:00Z

Content type: article

Language: en

Sources: [OpenAI News](<https://devfeed.tech/sources/openai-news.md>)

Topics: [gpt-oss](<https://devfeed.tech/topics/gpt-oss.md>), [Chain-of-thought](<https://devfeed.tech/topics/chain-of-thought.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [API](<https://devfeed.tech/topics/api.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [chain-of-thought](<https://devfeed.tech/tags/chain-of-thought.md>), [gpt-oss](<https://devfeed.tech/tags/gpt-oss.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [oss](<https://devfeed.tech/tags/oss.md>), [reasoning](<https://devfeed.tech/tags/reasoning.md>), [report](<https://devfeed.tech/tags/report.md>), [safety](<https://devfeed.tech/tags/safety.md>), [technical](<https://devfeed.tech/tags/technical.md>)

## AI overview

This technical report introduces gpt-oss-safeguard-120b and gpt-oss-safeguard-20b, open-weight reasoning models fine-tuned from gpt-oss to classify content according to a supplied policy. It describes their capabilities, customization, chain-of-thought support, Responses API compatibility, and baseline safety evaluations.

## Source excerpt

gpt-oss-safeguard-120b and gpt-oss-safeguard-20b are two open-weight reasoning models post-trained from the gpt-oss models and trained to reason from a provided policy in order to label content under that policy. In this report, we describe gpt-oss-safeguard's capabilities and provide our baseline safety evaluations on the gpt-oss-safeguard models, using the underlying gpt-oss models as a baseline. For more information about the development and architecture of the underlying gpt-oss models, see the original gpt-oss model model card⁠.