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Anjali Batra

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originally published on Jul 14, 2025
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As large language models (LLMs) play an increasingly vital role in content generation, software development, and decision-making, ensuring the safety and compliance of their inputs has never been more critical. OpsMx addresses this challenge through its AI Delivery Shield platform, which now includes a powerful new feature: the Dynamic LLM Vulnerability Scanner (DLVS). At the heart of this feature is Garak, a robust scanning tool that performs essential pre-processing safety checks—an often overlooked but crucial step in securing LLM interactions.

What is Garak?

Garak is an open-source vulnerability scanner built specifically for Large Language Models (LLMs), such as those based on GPT architectures. Its core mission is to uncover potential security risks, ethical flaws, and behavioral instabilities in AI models before they’re deployed in real-world applications.

Designed with a focus on AI safety and trustworthiness, Garak evaluates how models behave under various conditions by probing them with a wide range of tests. It helps identify critical issues such as:

  • Prompt Injection 
  • Data Leakage
  • Hallucination 
  • Misinformation
  • Toxicity generation
  • Jailbreaks  and more..

What makes Garak particularly powerful is its use of static, dynamic, and adaptive probes—allowing it to simulate real-world scenarios where LLMs may behave unpredictably or unsafely. In essence, Garak actively explores how and where LLMs can fail, providing actionable insights for developers, researchers, and AI safety teams.

Why Scanning LLMs Before Use Is Absolutely Critical

As Large Language Models (LLMs) become foundational in modern applications, ensuring their safe, secure, and ethical deployment is more important than ever. Here’s why vulnerability scanning tools like Garak are essential before putting an LLM into production:

1. Preventing Data Breaches and Leakage

LLMs can unintentionally expose sensitive information—like Personally Identifiable Information (PII)—either through their training data or manipulated inputs. Pre-deployment scanning helps uncover these risks, preventing data leaks, protecting user privacy, and ensuring compliance with security standards.

2. Defending Against Prompt Injection Attacks

Prompt injection attacks manipulate an LLM into behaving unexpectedly, potentially leaking data or executing malicious tasks. Scanning for these vulnerabilities helps ensure your model responds only as intended, maintaining output integrity and control.

3. Ensuring Model Integrity and Reliability

Unpatched vulnerabilities can cause LLMs to generate inaccurate, biased, or even harmful content. By scanning regularly, you can detect and fix these issues early, ensuring your model consistently delivers trustworthy and reliable responses.

4. Maintaining User Trust and Organizational Reputation

Security incidents, misinformation, or toxic outputs can severely damage user trust. Proactive scanning shows your organization is committed to responsible AI development, helping build credibility and confidence in your LLM-powered services.

5. Mitigating Training Data Poisoning

Attackers can compromise a model during training by injecting malicious data, leading to biased or dangerous behaviors. Vulnerability scanning helps detect signs of training data poisoning, allowing you to address issues before deployment.

6. Securing Output Handling in Integrated Systems

LLMs often work within larger systems. If their outputs aren’t properly validated, they can become a vector for security breaches. Scanning helps ensure outputs are sanitized, controlled, and safely handled by downstream applications.

7. Promoting Ethical AI Use

LLMs must be used responsibly. Garak helps identify and prevent unethical behavior—such as generating toxic, discriminatory, or misleading content—before it reaches end users. This is a key step toward building safe, fair, and inclusive AI systems.

By integrating vulnerability scanning tools like Garak into your LLM workflows, you’re not just protecting your systems—you’re elevating trust, security, and ethical standards in AI-powered solutions.

LLM Repositories and Platforms Supported by Garak

Garak is designed to work seamlessly across a diverse range of LLM repositories and platforms, offering broad compatibility for both hosted and non-hosted models. It supports scanning hosted models via API access, including popular offerings like OpenAI’s GPT-2, GPT-4, and others.

For non-hosted models, Garak integrates with repositories such as Hugging Face, Replicate, NIM, GGML, Cohere, and more. In these cases, it downloads the model locally and performs vulnerability scans using the appropriate backend interface—ensuring flexible and comprehensive coverage across deployment types.

Conclusion: Building a Safer LLM Future Starts with Garak

As LLMs become deeply woven into the fabric of modern applications—from automating tasks to powering mission-critical decisions—their safe and responsible use is no longer optional; it’s essential. Garak offers a proactive, flexible, and intelligent approach to securing these models, helping organizations anticipate risks before they surface.

By embedding Garak scans into your AI pipeline through tools like OpsMx’s AI Delivery Shield, you ensure that every model interaction is thoroughly vetted for security, privacy, and ethical compliance. Whether you’re working with hosted APIs or deploying custom models from open repositories, Garak empowers your team to stay ahead of threats and build trustworthy, transparent, and resilient AI systems.

In the evolving landscape of AI, vulnerability scanning isn’t just a best practice—it’s the first step toward building LLMs you can trust.

Director of Artificial Intelligence with 25+ years of leadership experience across MNCs, startups, and mid-sized firms in Healthcare, Media, and Print Technology. I drive data science initiatives for smarter decisions, secure AI/ML, and operational efficiency. Expertise includes architecting CI/CD-embedded AI remediation systems, establishing AI security frameworks with scanning tools, and integrating human feedback for real-time tuning. Proven in end-to-end program delivery (SDLC), client consulting, enterprise solution architecture (Agile), and leading cross-functional teams through strategic execution and stakeholder management.

Sandesh is a Principal Architect at OpsMx with a strong background in DevOps and CI/CD. He’s helped some of the world’s biggest companies (including Fortune 50 enterprises) streamline their delivery pipelines and embrace continuous delivery at scale. A long-time contributor to the Spinnaker open-source project, he was recognized as a “Most Valuable Project Contributor.” These days, Sandesh is diving into the world of AI—leading efforts to build secure, AI/ML-powered solutions for enterprise teams.

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