Prompt Engineering Guide

Actionable strategies, expert tips, and examples for mastering prompt engineering with ChatGPT, Claude, Gemini, Grok, Perplexity, and top AI language models.

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ChatGPTChatGPT
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GPT-4.5 vs GPT-4o: Which ChatGPT Model Should You Use? (Project Manager’s Edition)

GPT-4.5 vs GPT-4o: Which ChatGPT Model Should You Use? (Project Manager’s Edition)

GPT-4.5 (“Research Preview”) vs GPT-4o – each model has its strengths; choose based on your task and needs.

Dr. Hernani Costa
Dr. Hernani Costa
AI ToolsAI Tools
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OpenAI o3-pro: Advanced AI Reasoning Model 2025

OpenAI o3-pro: Advanced AI Reasoning Model 2025

Discover OpenAI's most capable o3-pro model with enhanced reasoning, tool integration, and benchmark performance for coding, math, and science tasks.

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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GPT-4o: ChatGPT’s Multimodal Workhorse for Everyday Tasks

GPT-4o: ChatGPT’s Multimodal Workhorse for Everyday Tasks

Great for most routine tasks and fully multimodal – what GPT-4o is and when to use it

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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GPT-4.5 vs GPT-4o: Which ChatGPT Model Should You Use?

GPT-4.5 vs GPT-4o: Which ChatGPT Model Should You Use?

Creative wordsmith or speedy multitasker – choosing between GPT-4.5 (Research Preview) and GPT-4o for your needs

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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OpenAI o3 – ChatGPT’s Advanced Reasoning Brain

OpenAI o3 – ChatGPT’s Advanced Reasoning Brain

Complex multi-step reasoning made easier – what OpenAI o3 is and when to choose this model

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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What is o3‐pro and Why Use It for Tough Problems?

What is o3‐pro and Why Use It for Tough Problems?

ChatGPT’s best-at-reasoning model – o3-pro delivers ultra-reliable answers when accuracy matters most

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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GPT-4 “Mini” vs “Mini-High” – Which Model for Coding and Technical Tasks?

GPT-4 “Mini” vs “Mini-High” – Which Model for Coding and Technical Tasks?

Fast fixes or in-depth solutions – understanding OpenAI’s o4-mini and o4-mini-high models for programmers and problem-solvers

Dr. Hernani Costa
Dr. Hernani Costa
ChatGPTChatGPT
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How Can I Access These ChatGPT Models? (Plus vs Pro Plans)

How Can I Access These ChatGPT Models? (Plus vs Pro Plans)

GPT-4.5, o3, and more – what each ChatGPT subscription tier offers and how to get the model you need

Dr. Hernani Costa
Dr. Hernani Costa
AI ToolsAI Tools
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GPT-4 vs. GPT-3.5 – Which OpenAI Model Should You Use?

GPT-4 vs. GPT-3.5 – Which OpenAI Model Should You Use?

Comparing ChatGPT’s GPT-4 and GPT-3.5 models to help you balance intelligence, speed, and cost

Dr. Hernani Costa
Dr. Hernani Costa
AI ToolsAI Tools
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What Are ChatGPT Projects?

What Are ChatGPT Projects?

Organize your chats, files, and workflows with OpenAI’s new “Projects” feature in ChatGPT

Dr. Hernani Costa
Dr. Hernani Costa
AI ToolsAI Tools
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How Do I Set Up and Use a ChatGPT Project?

How Do I Set Up and Use a ChatGPT Project?

Step-by-step: Creating a new Project in ChatGPT and customizing it with files and instructions

Dr. Hernani Costa
Dr. Hernani Costa
AI ToolsAI Tools
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How Can I Upload Files or Attachments for ChatGPT to Analyze?

How Can I Upload Files or Attachments for ChatGPT to Analyze?

Using ChatGPT’s attachments to have the AI read PDFs, images, spreadsheets, and more

Dr. Hernani Costa
Dr. Hernani Costa