For the last decade, the mantra of content marketing has been “Long-Form Content.” Creating 3,000-word “Ultimate Guides” was the surest way to rank. But as the consumers of content shift from bored humans to efficient AI agents, this strategy is hitting a wall. The new metric of success is Information Density.

The Context Window Constraint

While context windows are growing (128k, 1M tokens), they are not infinite, and more importantly, “reasoning” over long context is expensive and prone to “Lost in the Middle” phenomena.