Guides
Practical, step-by-step guides from the Cortex AI team.
How to fact-check an AI answer and catch hallucinations
Why AI chatbots sometimes state wrong facts with confidence, which answers deserve a second look, and a practical routine for checking them with web search, a second model and the original source.
Published: 4 min read
How to ask AI about a PDF, photo or screenshot on your phone
Summarise a long PDF, pull figures out of a report, explain a chart or decode an error screenshot: what AI does well with files, how to prepare them and how to check what it reads.
Published: 3 min read
Which AI model to use for writing, coding, research and summaries
There is no single best AI model. How to match a model to the task by what it needs (speed, reasoning, live data or file reading), shortlist candidates and confirm the choice with your own prompts.
Published: 4 min read
How to compare AI models on the same prompt and pick the best answer
Why GPT-4, Claude and Gemini answer the same question differently, how to run a fair side-by-side test on your phone, and how to decide which model to use for which kind of task.
Published: 4 min read
How to write better prompts for AI chat apps, with examples
A simple prompt structure that works across GPT-4, Claude, Gemini and other models: give the context, state the task, set the constraints, name the format, then refine in follow-ups.
Published: 4 min read