The 1M Context Window Actually Changes How I Code

Loaded my entire 12-repo studio into one session and stopped re-explaining context to the model every hour Ran a seven-hour debug across Shopify, Vercel, and my blog pipeline without resetting the thread once Dropped three full API docs in one prompt and got a direct answer on which auth pattern matched my stack Prompt caching drops the math to roughly 1.20 EUR per loaded session, which is why I now keep threads open for days Opus 4.7 shipped with a 1 million token context window, and after thre