16th October 2025
Tool
OpenAI Prompt Caching Playground
— Explore OpenAI's prompt caching feature by testing different prompt structures and observing cache hit rates across multiple requests. This interactive playground lets you compose system instructions, document context, and user questions, then send them to the Chat Completions or Responses API to track how cached tokens reduce costs and improve performance.
Recent articles
- Is Claude Code going to cost $100/month? Probably not - it's all very confusing - 22nd April 2026
- Where's the raccoon with the ham radio? (ChatGPT Images 2.0) - 21st April 2026
- Changes in the system prompt between Claude Opus 4.6 and 4.7 - 18th April 2026