Modular Tech Stack

The AI landscape changes faster than any technology market in history. In 2023, GPT-4 was the undisputed king. By 2025, it had been matched or surpassed by Claude 3.5, Gemini 1.5, Llama 3, and a dozen open-source models. In the same period, OpenAI changed pricing 6 times, deprecated 3 models, and suffered multiple outages. The companies that built their AI stack around a single provider are now facing painful migrations. This book is about building an AI stack that is provider-agnostic, future-proof, and cost-optimized through modular architecture.