# Context Window Economics: 200K, 1M, 10M Token Contexts — Money Fire or Superpower?

> Source: https://sukruyusufkaya.com/en/learn/token-ekonomisi/context-window-ekonomisi-200k-1m-token-bagam
> Updated: 2026-05-14T14:44:10.831Z
> Category: Token Ekonomisi & LLM Cost Optimization
> Module: Module 1: Token Anatomy — What's Inside a Token?
**TLDR:** Modern LLM context windows reach 200K-10M tokens. But big context isn't cheap: a single 200K Sonnet 4.6 call costs $0.60. We analyze the real cost of 'put the whole book in the prompt', when it's worth it, when it's a killer.