1M-Token Context Windows in 2026 — When They Help, When They Hurt
How to actually use 1M-token context windows. The ‘just put it all in context’ temptation, when it works, when RAG still wins, prompt caching, and cost.
How to actually use 1M-token context windows. The ‘just put it all in context’ temptation, when it works, when RAG still wins, prompt caching, and cost.