The True Cost of LLM APIs in 2026: How Multi-Model Routing Cuts Bills by 30–50%

If you're running an LLM-powered product in production, your monthly AI bill is almost certainly higher than it needs to be, often by a factor of two. This isn't a pricing problem. Frontier models from OpenAI, Anthropic, Google, and the open-weight ecosystem have never been cheaper per token. The problem is architectural. Most teams send every request to a single high-end model, pay full retail through whatever SDK they wired up first, and then absorb a hidden gateway markup on top of that, with