Author’s note: A breakdown of how OpenAI’s 12-hour Prompt Cache affects GPT-6 API costs, using a payback formula and 5 decision criteria to show which scenarios save money with caching turned on, and which ones see limited returns. OpenAI has added a 12-hour cache retention capability to Prompt Cache, and for teams calling the GPT-6…
Author’s note: This comparison looks at AI APIs versus ChatGPT and Claude memberships across 5 dimensions—billing model, usage limits, feature form, model choice, and integration & data—to help you pick the right option for each scenario and get your costs straight in 2026. When choosing AI tools, a lot of people run into the same…
Author’s note: Use curl and the SDK to time DNS, TLS, first token, and total latency, then run through a 4-step method to figure out whether a slow Large Language Model API call from mainland China is bottlenecked by the “cross-border link” or by “model inference.” “Why is this API so slow?” That’s the line…
Author’s note: This review of the GPT-6 Luna Decisions API looks at four angles — underlying principles, hands-on testing methods, latency metrics, and business scenarios — to help you decide whether “decision-oriented calls” are faster and better suited to your business than standard model invocations. Since GPT-6 Luna’s Decisions API officially launched, the question developers…
