This document is a guide on penetration testing specifically designed for AI systems. It outlines the increasing security risks associated with the deployment of AI technologies, including large language models and generative models. The guide explains that traditional security tools are often inadequate for addressing these new vulnerabilities, which can lead to adversarial exploitation and compliance violations. The document details how Flexential's penetration testing service assesses AI systems by simulating real-world attacks to identify vulnerabilities. It emphasizes the importance of collaboration with IT and security teams to validate findings and provide comprehensive remediation guidance. The guide also lists various threats that AI systems face, such as prompt injection and data poisoning, and highlights the benefits of improved security and compliance through rigorous testing. Overall, the document aims to enhance cyber resiliency and protect sensitive data within AI deployments.