Comparing NVIDIA GPUs for AI workloads like fine-tuning foundation models, deploying large open-source models, and serving Large Language Models (LLMs) requires powerful GPUs with specific specs to understand when comparing cards with different architectures, core types, and memory capacity. The key specs to consider are cores, specifically CUDA cores for general-purpose computing, tensor cores optimized for machine learning calculations, and VRAM as a hard limit on model size. When selecting a GPU, price to performance is crucial, considering both the cost per minute and total cost of operation, including factors like availability, which has become increasingly scarce due to high demand. Options for scaling infrastructure vertically (increasing instance power) or horizontally (using multiple replicas of a lower-cost GPU) must also be considered. The NVIDIA T4 and A10 GPUs are two widely available options, with the T4 being less expensive but still powerful enough for many AI workloads, while the A10 offers more performance but at a higher cost per minute. Ultimately, choosing the right GPU depends on factors like model size, invocation time, and specific use cases, such as running Whisper or Stable Diffusion XL models.