# Qwen3Guard-8B ![Organization](https://img.shields.io/badge/Org-Alibaba-555) ![Pricing](https://img.shields.io/badge/Price-Open%20Weights-2da44e) ![License](https://img.shields.io/badge/License-Apache%202.0-d29922) ![Modality](https://img.shields.io/badge/Modality-Text-8957e5) > **Quick answer:** Qwen3Guard-8B is Alibaba's 8B-parameter open-weights safety classifier, part of the Qwen3Guard family built for real-time (streaming) and generation-time content moderation. It scores highest among comparison models on the vendor-released Qwen3GuardTest benchmark and remains competitive across WildGuardTest and HarmBench. ## At a Glance **Where it leads:** WildGuardTest (Prompt) — narrowly the top score among Shieldstral's comparison set — and its own Qwen3GuardTest evaluation. **Where it lags:** Multimodal tasks (no vision support) and multilingual PolyGuard/RTP-LX benchmarks relative to purpose-built multilingual classifiers. **Best for:** Teams needing an open, mid-sized (8B) text safety classifier with both batch and streaming/real-time moderation modes. ## What Qwen3Guard-8B Is Qwen3Guard-8B is part of Alibaba's Qwen3Guard family, available in Gen (standard) and Stream (real-time, token-by-token) variants across multiple sizes. It's designed for prompt and response safety classification, trained on Alibaba's own safety taxonomy and evaluation methodology (Qwen3GuardTest). ## Specifications | Field | Value | |---|---| | Organization | Alibaba | | Parameters | 8B | | License | Apache 2.0 | | Modality | Text only | | Variants | Gen (standard), Stream (real-time) | ## Pricing Open weights, free to download. ## Public Benchmark Scores *Scores from Mistral AI's Shieldstral model card, shown for context. Not Benchgen measurements. Figures reflect an average over strict/loose label mappings.* | Benchmark | Score | |---|---| | [WildGuardTest (Prompt)](/benchmarks/allen-institute-for-ai/wildguardtest-prompt) | 88.2% | | [HarmBench (Prompt)](/benchmarks/center-for-ai-safety/harmbench-prompt) | 99.3% | | [Qwen3GuardTest](/benchmarks/alibaba/qwen3guardtest) | 91.0% | | [Aegis v2 (Prompt)](/benchmarks/nvidia/aegis-v2-prompt) | 83.1% | | [XSTest (Harm)](/benchmarks/independent-research/xstest-harm) | 91.2% | ## Related Models & Benchmarks - [Shieldstral 1.0](/models/mistral-ai/shieldstral-1-0) · [GPT-OSS-Safeguard-20B](/models/openai/gpt-oss-safeguard-20b) - [Qwen3GuardTest](/benchmarks/alibaba/qwen3guardtest) · [WildGuardTest (Prompt)](/benchmarks/allen-institute-for-ai/wildguardtest-prompt) ## Frequently Asked Questions

What is Qwen3Guard-8B?

Alibaba's 8B open-weights safety classifier for prompt and response moderation, available in standard and real-time streaming variants.

Is it multimodal?

No, it's text-only.

Is it open source?

Yes, released under Apache 2.0.

--- *Scores sourced from Mistral AI's [Shieldstral model card](https://huggingface.co/mistralai/Shieldstral-1.0-3B), shown for context. Last updated 2026-08-12.*

Qwen3Guard-8B — Evaluations

Evaluations