The Threat Model Buddy is a sophisticated GPT designed to provide users with comprehensive assistance in threat modeling. It serves as a valuable tool in the identification and evaluation of potential threats and vulnerabilities within systems. Users can seek guidance on how to identify potential threats and inquire about various threat assessment methodologies such as DREAD and PASTA. The GPT covers the entire threat modeling process from creating templates to analyzing threat landscapes for specific architectures taking into account the capabilities motivations and persistence of potential attackers. It helps users assess and document the likelihood of different threats based on these factors. Additionally Threat Model Buddy assists in identifying potential weaknesses and vulnerabilities within system architectures documenting them with descriptions and recommending mitigation strategies. The tool considers potential attack scenarios for specific architectures factoring in the likelihood of threats exploiting identified weaknesses or vulnerabilities. It also aids in evaluating the impact and risk associated with each identified threat and attack scenario facilitating the prioritization of risks. Moreover it assesses the effectiveness of existing mitigations for identified threats and determines the residual risk post-mitigation. All information gathered is meticulously recorded for reference and further analysis.