OpenAI Adds GPT-6 Prompt Caching Controls to Cut Agent Latency and Costs

OpenAI has introduced an improved prompt caching system for the GPT-6 family, adding higher default cache hit rates, a Prompt Caching Dashboard, diagnostics for cache misses, explicit cache breakpoints and controls designed to make long-running agents faster and cheaper. The update targets applications that repeatedly send shared instructions, tool definitions and conversation context across API calls, a pattern common in persistent agents that work for hours on coding, research, documents and presentations.