---
language:
- en
- vi
- hi
- th
- zh
- ja
- ru
- ar
- sv
- es
- it
library_name: transformers
pipeline_tag: text-classification
base_model:
- Qwen/Qwen3Guard-Gen-4B
tags:
- content-safety
- prompt-injection
- multi-label-classification
- safety
- multilingual
- qwen3
- hikmaai
license: apache-2.0
---

# HikmaGuard

HikmaGuard is a multilingual AI safety model built on
[Qwen/Qwen3Guard-Gen-4B](https://huggingface.co/Qwen/Qwen3Guard-Gen-4B) by
[HikmaAI](https://huggingface.co/HikmaAI). It identifies content-safety risks and
prompt-injection attempts across user prompts, documents, emails, tool outputs, and
other untrusted content.

Nine specialized safety signals with calibrated confidence scores make HikmaGuard a
flexible foundation for moderation, guardrails, and policy enforcement in multilingual
AI applications.

## Model description

- **Version**: 0.1.0
- **Base model**: `Qwen/Qwen3Guard-Gen-4B`
- **Architecture**: `Qwen3ForSequenceClassification`
- **Maximum length**: 2048 tokens with head-tail truncation
- **Input kinds**: `user_prompt`, `external_content`
- **Fine-tuning**: LoRA rank 16, merged into BF16 weights
- **Policy/taxonomy**: `unified-guard-v1`

The independent heads are:

`hate`, `abuse`, `violence`, `self_harm`, `sexual_harm`, `misconduct`,
`dangerous_capability`, `prompt_injection`, and `indirect_prompt_injection`.

Applications can combine these specialized signals according to their own safety policy,
risk tolerance, and enforcement workflow.

## Calibrated thresholds

| Head | Threshold |
|---|---:|
| hate | 0.151028 |
| abuse | 0.321673 |
| violence | 0.576542 |
| self_harm | 0.143188 |
| sexual_harm | 0.191933 |
| misconduct | 0.774583 |
| dangerous_capability | 0.754915 |
| prompt_injection | 0.980000 |
| indirect_prompt_injection | 0.992000 |

The thresholds in `thresholds.json` are bound to this model by both the model-config
SHA-256 and the `hikma_artifact_id`, making deployments reproducible and easy to audit.

## Usage

```python
import json
import torch
from huggingface_hub import hf_hub_download
from transformers import AutoModelForSequenceClassification, AutoTokenizer

repo_id = "HikmaAI/HikmaGuard"
heads = ['hate', 'abuse', 'violence', 'self_harm', 'sexual_harm', 'misconduct', 'dangerous_capability', 'prompt_injection', 'indirect_prompt_injection']
input_kind = "user_prompt"  # or "external_content"
text = "Example text to classify"

tokenizer = AutoTokenizer.from_pretrained(repo_id)
model = AutoModelForSequenceClassification.from_pretrained(
    repo_id,
    torch_dtype=torch.bfloat16,
    device_map="auto",
).eval()

messages = [{
    "role": "user",
    "content": (
        f"Source: {input_kind}\n"
        "<BEGIN_UNTRUSTED_CONTENT>\n"
        f"{text}\n"
        "<END_UNTRUSTED_CONTENT>"
    ),
}]
formatted = tokenizer.apply_chat_template(
    messages,
    tokenize=False,
    add_generation_prompt=False,
)
encoded = tokenizer(formatted, truncation=False, padding=False)
for key, sequence in encoded.items():
    if len(sequence) > 2048:
        encoded[key] = (
            sequence[:1024]
            + sequence[-1024:]
        )
inputs = tokenizer.pad(encoded, padding=True, return_tensors="pt").to(model.device)

with torch.no_grad():
    scores = torch.sigmoid(model(**inputs).logits)[0].float().cpu().tolist()
thresholds = json.load(open(hf_hub_download(repo_id, "thresholds.json")))
result = {
    head: {
        "score": score,
        "detected": score >= thresholds["heads"][head]["threshold"],
    }
    for head, score in zip(heads, scores)
}
```

For batched inference, apply head-tail truncation to each sequence before padding.
Content-safety and direct-injection inputs use `user_prompt`; untrusted documents or
tool output use `external_content`.

## Training and evaluation notes

- Training used a deterministic 100,000-record multilingual coreset with partial-label
  masking across content safety, direct prompt injection, and indirect prompt injection.
- Specialized supervision preserves the distinction between content safety, direct prompt
  injection, and indirect prompt injection.
- This version is optimized for user prompts and untrusted external content.

## License

Apache-2.0. See `LICENSE`.

## Citation

```bibtex
@misc{hikmaai-hikmaguard-2026,
  title={HikmaGuard},
  author={HikmaAI},
  year={2026},
  publisher={Hugging Face},
  url={https://huggingface.co/HikmaAI/HikmaGuard}
}
```