The Best Free Guides on AI, Agents & Prompts (That No One’s Talking About)

Most people are guessing their way through AI.
A few are using insider playbooks - straight from the teams behind ChatGPT, Claude, and Gemini.

Here’s the thing:
In the last few months, OpenAI, Google, and Anthropic quietly dropped some of the most valuable (and free) guides on how to actually use AI - to work faster, build better tools, and grow smarter businesses.

They teach you:

• How to write better prompts

• How to build useful AI agents

• How to scale AI in business

• 600+ real use cases from the top companies give title for this in short

Skip the trial and error.
These docs will save you weeks of Googling and guessing.

Let’s break down the 9 best ones 👇

1. AI in the Enterprise: OpenAI

Link: Download PDF

This is the AI playbook for business people, not developers.

📌 What’s inside:

• How leading companies are using ChatGPT

• Risks, ROI, and rollout tips

• Templates for internal use cases

• Quick wins by industry

Use it if you’re figuring out how to bring AI into your team without breaking things.

2. A Practical Guide to Building Agents: OpenAI

Link: Download PDF

Think of this as “Autonomous Agents for Beginners.”

📌 What’s inside:

• What agents are and how they work

• Tool use, memory, planning, explained simply

• Common mistakes and patterns

• Real-world examples

Even if you’re not a dev, this gives you the blueprint.

3. Prompting Guide 101: Google

Link: Download PDF

Your go-to guide for writing better prompts for tasks like:

• Writing

• Research

• Data analysis

• Slide making

• Email replies

📌 Great for:
People using Gemini or ChatGPT for productivity. Short, crisp, and very visual.

4. Identifying & Scaling AI Use Cases: OpenAI

Link: Download PDF

If your company keeps saying “Let’s use AI” but no one knows how, start here.

📌 Inside:

• What makes a use case work

• A scoring system to find high-ROI ideas

• Checklist to evaluate use cases

• 3 paths to scale inside orgs

This guide helps you move from “idea” to “MVP” quickly.

5. Building Effective Agents: Anthropic

Link: Read Here

More technical than OpenAI’s version, but great if you're working with APIs or coding agents.

📌 Learn:

• Why tool use matters

• How Claude handles tasks differently

• Agent safety and feedback loops

• Architecture patterns

Skip if you’re not building. Read if you want to prototype better.

6. Prompt Engineering: Anthropic

Link: Read Here

If you’ve ever asked, “Why are my Claude prompts not working?” this will fix that.

📌 What it covers:

• Claude-specific prompt formats

• Multi-step task planning

• Common pitfalls

• Examples that show output differences

This one’s a hidden gem if you're switching between tools.

7. Agents Companion: Kaggle

Link: Download PDF

A surprisingly good crash course in AI agents. Less dev jargon, more “here’s how to use agents in daily work.”

📌 Useful for:

• New product builders

• Startups adding automation

• No-code tool users

You’ll learn how agents think, act, and mess up: and how to guide them better.

8. 601 Real-World AI Use Cases: Google

Link: Read Here

This is a goldmine for anyone planning projects, building slides, or convincing a client/team to try AI.

📌 What’s inside:

• Use cases by function (sales, HR, legal, etc.)

• Use cases by industry (retail, finance, logistics…)

• Short and scannable format

• Comes with links to case studies

Bookmark it. Use it to pitch. Or steal ideas for your own workflows.

9. Prompt Engineering: Google (Kaggle Edition)

Link: Download PDF

Don’t let the title fool you: this is one of the most practical guides out there.

📌 What’s inside:

• Prompt techniques by category (summarizing, rewriting, generating)

• Chain-of-thought prompting

• When to use system prompts

• Prompt → Output examples for each case

If you’re tired of generic “just be clear” advice, read this.

💡 Final Word

AI doesn’t feel overwhelming when you have clarity.

And these free resources give you that. Straight from the labs building the tech.

You don’t need a course. You don’t need YouTube rabbit holes.
Just read these PDFs. Apply 1–2 ideas. Repeat.

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❓ FAQs - Using OpenAI, Google & Anthropic AI Guides

1. Are these AI guides beginner-friendly?
Yes. Most of them -especially OpenAI’s enterprise and agent guides, Google’s prompt 101, and Kaggle’s Agent Companion - are written for non-coders. They're short, visual, and made for real-world use.

2. Which guide should I read first if I’m new to AI?
Start with these three:

• AI in the Enterprise (OpenAI)

• Prompting Guide 101 (Google)

• Agent Companion (Kaggle)
  They give you a clean foundation without technical overwhelm.

3. Do these guides help with ChatGPT, Gemini, and Claude?
Yes. While some tips are tool-specific (e.g., Claude vs. ChatGPT prompts), the frameworks apply to all major LLMs - especially Gemini, GPT-4o, and Claude 3.

4. Can I use these for business and client work?
Absolutely. These guides are designed for:

• Automating internal ops

• Writing smarter prompts

• Scaling AI agents

• Pitching AI use cases to clients

5. Where can I find real AI use cases by industry?
Google’s 601 Use Cases PDF has the most comprehensive list - across sales, HR, logistics, legal, and more. Use it to build slides, get ideas, or pitch AI inside your team.

6. Is this better than watching YouTube or taking a course?
If you want fluff-free answers in under 30 minutes, yes. These are official guides, written by the engineers and product folks behind the tools. No affiliate ads. No filler.

7. Can I use this info for my startup or SaaS?
Totally. Use the Prompt Engineering guides (Anthropic + Google) for better outputs, and the Agents playbooks to build automated workflows into your product.

8. Are these PDFs free to download?
Yes. Every link here is public and free. No signups or spam, just straight from OpenAI, Google, Anthropic, and Kaggle.

9. How often are these guides updated?
Most are from 2024, so they’re current. But AI moves fast, it’s a good idea to follow these companies’ blogs or join newsletters like Fast Feed AI to stay updated.

10. I don’t know how to prompt well, where do I start?
Google’s Prompting Guide 101 and Anthropic’s Prompt Engineering Overview are your best bet. They show prompt → output examples, step-by-step, for writing, analysis, emails, and more.