OpenAI improves prompt caching for GPT-6

OpenAI upgrades prompt caching for GPT-6 with higher cache hit rates, new diagnostics, explicit breakpoints, and controls to cut latency and cost.

• Report: OpenAI GPT-6 Sol & Luna halve token costs2026-09-23
• ChatGPT Ads expands to Southeast Asia and Taiwan2026-09-24
• OpenAI's Third-Party Assessment Priorities Lack Teeth2026-09-24
• Helen Toner: There's a lot of upside to AI if we do it right2026-09-23
• Albanese Says OpenAI Agent Hacked Government Website2026-09-23