The AI Tool Landscape (and Choosing the Right One)

You decide to finally try AI for real. You open a browser tab and see four names: Claude, Gemini, Copilot, ChatGPT. Which one do you pick? Most people freeze, choose whatever a colleague once mentioned, use it a single time, and quietly give up. That hesitation is where readiness stalls.

Why This Matters

This pillar is about tools and technical skills, the practical ability to pick up an AI assistant and put it to work. It maps to your Tool and Agent Proficiency, one of the fifteen dimensions the pAIRI assessment measures. By the end of this lesson you will be able to:

• Describe what each of the four major AI assistants does well
• Describe how to reach each one
• Choose a single tool to use for the rest of this course

The Four Assistants, and What Each Does Well

In the last lesson you learned where AI still fails and why checking its output matters. Part 3 turns that into daily practice, and it starts with the tool you will use. Start with what these four have in common: it is more than the marketing suggests. All four hold a conversation, draft and rewrite text, summarise long documents, and answer questions. What differs is who builds each one and where it fits into your working day.

Claude, from Anthropic, is known for careful writing, clear reasoning, and working through long, detailed documents. You reach it at claude.ai.

Gemini, from Google, is built into the Google tools many people already use (Search, Gmail, and Docs), so it fits if you live there. You reach it at gemini.google.com.

Copilot, from Microsoft, sits inside Microsoft 365 (Word, Excel, Outlook, and Teams), so it works where your office documents already are. You reach it at copilot.microsoft.com.

ChatGPT, from OpenAI, is the one most people have heard of, a broad, general-purpose assistant with a large ecosystem of add-ons. You reach it at chatgpt.com.

The real question is not which is best in the abstract; it is which one meets you where you already work.

• ChatGPT help centre: help.openai.com
• Claude documentation: docs.anthropic.com
• Gemini: gemini.google.com
• Microsoft Copilot training: learn.microsoft.com/copilot
• Prompting guides: learnprompting.org
• Free short course, AI Prompting for Everyone: deeplearning.ai

Key Takeaway

Depth in one assistant beats breadth across four while you are learning.