{"type": "article", "title": "The Third Price: I Measured Prompt Caching Across 393 LLMs and Found a 90% Discount Hiding Behind One JSON Field", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/the-third-price-i-measured-prompt-caching-across-393-llms-and-found-a-90-hiding", "original_source": "https://dev.to/ptokito/the-third-price-i-measured-prompt-caching-across-393-llms-and-found-a-90-discount-hiding-behind-eck", "published": "2026-08-25T16:28:51+00:00", "accessed": "2026-08-25", "id": "the-third-price-i-measured-prompt-caching-across-393-llms-and-found-a-90-hiding"}