Prompt Caching Explained: Claude, OpenAI, Gemini (2026)
How prompt caching works on Claude, OpenAI, Gemini and Bedrock: minimum lengths, cache lifetimes, prices and a worked example of what a cached prefix saves.
Robert YoussefNov 4, 202612 min
Prompt Engineering
174 articles · page 1 of 15
The techniques behind the library: role framing, output contracts, few-shot examples, chain-of-thought and the mistakes that make prompts drift. This is the cluster AI assistants cite when someone asks how to write a better prompt.
Prompt Engineering articles
Anthropic Prompting Guide: What the Official Docs Say (2026)
A digest of Anthropic's official prompting guide for Claude: where each page lives, a worked example for every technique, and old advice that no longer applies.
Robert YoussefNov 4, 202610 min
Claude Prompting Best Practices: 10 Before-and-After Fixes
Claude prompting best practices shown as 10 before-and-after rewrites for everyday tasks, plus the fixes each current Claude model needs, with sources.
Robert YoussefNov 4, 20268 min
CRIT AI Prompt: Framework, Template and 6 Examples
What the CRIT AI prompt stands for, a fill-in template, one example worked through the Interview step, and six CRIT prompts you can copy today.
Robert YoussefNov 4, 20269 min
LLM Prompts: 14 Ready-to-Use Templates for Any Model
14 copy-paste LLM prompts for summaries, data extraction, critique and system prompts, written to run in ChatGPT, Claude, Gemini or a local model.
Robert YoussefNov 4, 202610 min
Smart Prompts: 20 Prompts That Make the Model Think Before It Answers
A smart prompt makes the model plan, check and ask before it writes. These 20 do that for everyday tasks, from a decision memo to a bug fix, and they work in ChatGPT, Claude and Gemini.
Robert YoussefOct 29, 20265 min
Funny Prompts: 40 Prompts That Make AI Write Something Actually Funny
AI is bad at jokes and good at comedy with a structure. These 40 funny prompts give it the structure: a premise, a character, a format and a rule, for roasts, parodies, absurd instructions and more.
Robert YoussefOct 29, 20265 min
Prompt Optimization: How to Improve a Prompt That Almost Works
Most prompts fail by a little. Prompt optimization is the method for closing that gap: measure the output, change one thing, measure again. Here is the method with the checks and the fixes.
Robert YoussefOct 29, 20268 min
Prompt Lab: How to Set Up a Place to Test Prompts, With 12 Experiments to Run
A prompt lab is a repeatable way to test prompts: a test set, a scoring sheet and a log. Here is how to set one up in an hour with a spreadsheet, and twelve experiments that teach more than any guide.
Robert YoussefOct 29, 20265 min
Which Three Elements Make Up an Effective Prompt? Task, Context and Format
Every effective prompt has three elements: the task, the context the model needs, and the format of the answer. Here is what each one does, what goes wrong when it is missing, and a template you can reuse.
Robert YoussefOct 29, 20265 min
Role Play Prompts: 30 Scenarios for Practice, Training and Storytelling
Role play prompts put the model in a part and you in the scene: a tough customer, an interviewer, a language partner, a character in a story. These 30 are built so the model stays in role and the practice is real.
Robert YoussefOct 29, 20266 min
What Is a Prompt Engineer? The Job, the Skills and How to Learn It
A prompt engineer designs, tests and maintains the instructions that make AI systems work. Here is what the job involves, what it pays for, and which prompt engineer course path teaches the skills employers check.
Robert YoussefOct 29, 20265 min
Prompts for this topic
Put these articles to work with the prompts engineered for them in the God of Prompt library.
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