AI model performance metrics explained

This post introduces and explains the three core AI model performance metrics: Time to First Token (TTFT), Tokens Per Second (TPS), and End-to-End Latency. It details how each metric impacts user experience, discusses the influence of model size and provider optimizations, and provides guidance on evaluating API providers based on performance stability and consistency. The post also highlights the inherent tradeoffs between performance, cost, and quality, and maps specific use cases to the most relevant performance metrics.