OpenAI. OpenAI's own Build Hour on prompt caching — the 1024-token threshold, the prefix-stability requirement, steep audio-caching discounts for realtime (check the current pricing page for the exact rate), time-to-first-token impacts at long inputs. Useful when you are sizing the engineering effort to actually hit the cache reliably on your production prompts.
Well under our view bar but it's the official deep dive; the 1024-token threshold and prefix-stability rules decide whether caching works for you at all, and current rates live on the pricing page.
Use prompt caching only when stable prefixes, latency and cost behavior match the workload.
You should already be shipping prompts against the OpenAI API — the session is about hitting the cache reliably in production.
Last reviewed: May 18, 2026
Continue through the same learning path with the next curated companion videos.
18 minutesSee how approval gates can be implemented as explicit workflow checkpoints rather than informal manual review after something goes wrong.
4 minutesUnderstand why multilingual embeddings matter for private internal search and where local retrieval can reduce data-exposure risk.
17 minutesSet up a multi-agent coding workflow with explicit review boundaries so generated changes stay small, tested and owned.
Hand-picked external courses that go deeper on this topic.
University of Helsinki · MinnaLearnUniversity of Helsinki
The most trusted free AI introduction in Europe — built by the University of Helsinki, taken by over a million people, and available in English and 20+ other languages (including Estonian). No code, no math anxiety, and a certificate at the end. If you want the calm, credible version of 'what is AI actually', this is it.
Coursera · DeepLearning.AIAndrew Ng
Years after launch, still the cleanest starting point for anyone who needs to understand AI without learning to code. No math, no jargon, no hype — you'll finish able to have an informed conversation about AI projects.
HubSpot AcademyBrenna Zenaty, Adriti Gulati
Closes our biggest vertical blind spot: nothing in the catalog spoke directly to support and customer-success teams. HubSpot Academy is free, well-produced, and refreshingly concrete — it walks through AI-assisted ticket triage and a knowledge-base agent rather than staying abstract, and the certificate is free too, not a paywall bait-and-switch.
