Native Bedrock Codex GPT-5.6 Sol lacks explicit cache controls, producing high cache-write spend
Summary
A GitHub Codex issue documents that native Bedrock Codex GPT-5.6 Sol lacks explicit prompt caching controls, leading to large cache-write volumes and higher costs in production workloads. Observed data show substantial cache-write usage and a proposed feature set to surface and control caching, including prompt_cache_options and prompt_cache_breakpoint, plus telemetry improvements. The report highlights the cost risk and recommended changes to enable cost-aware caching for stable-prefix workflows.