Infrastructure Market: OpenAI improves prompt caching for GPT-6

OpenAI announced improved prompt caching for its GPT-6 model family, designed to enhance performance for persistent agents handling complex, multi-step tasks. The new system achieves higher cache hit rates by default, offers cache discounts of up to 90% on eligible shared prefixes within a 30-minute window, and introduces tools for monitoring and diagnosing cache performance. A new Prompt Caching Dashboard helps developers track hit rates and compare cached vs. uncached tokens. The diagnostics tool identifies causes of cache misses, such as changes to tools or settings. New features include explicit cache breakpoints, the ability to adjust reasoning effort without breaking cache, and guidance on preserving cache when tools or instructions change. Prewarming the cache is also supported to reduce latency. These updates aim to help developers optimize caching for cost efficiency and response times.