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Ideas on AI and data

Practical guides, trends and behind-the-scenes from people who live and breathe artificial intelligence and data.

Why AI makes things up (hallucination) and how not to fall for itArtificial Intelligence
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Why AI makes things up (hallucination) and how not to fall for it

AI sometimes answers with total confidence things it simply made up. Understand why artificial intelligence hallucinates, where it happens most and a practical checklist to not fall for it.

4 min read·Jul 16, 2026
From hype to usefulness: how to measure the ROI of AI
Artificial Intelligence

From hype to usefulness: how to measure the ROI of AI

Almost everyone adopted AI, but few measure whether it actually pays off. Here is a simple method to calculate the ROI of artificial intelligence at work, the costs nobody adds up and the metrics that only fool you.

4 min read·Rafa Costa
AI for hype vs AI for productivity: the difference between posting and producing
Artificial Intelligence

AI for hype vs AI for productivity: the difference between posting and producing

Some people use AI to look modern, others use it to produce more and better. Understand the difference between using artificial intelligence for hype and using it as a real productivity booster, and how to make the switch.

4 min read·Rafa Costa
Will AI Take Your Job? What Meta Laying Off 8,000 People Really Teaches
Artificial Intelligence

Will AI Take Your Job? What Meta Laying Off 8,000 People Really Teaches

Meta laid off around 8,000 people betting on AI, but Zuckerberg himself admitted the tech hasn't delivered as expected. The real story is less apocalyptic and far more useful for your career.

3 min read·Rafa Costa
Model Distillation: How One AI Learns by "Copying" Another (and Why It Sparked a US-China Fight)
Artificial Intelligence

Model Distillation: How One AI Learns by "Copying" Another (and Why It Sparked a US-China Fight)

How can a cheap AI model be almost as good as one that cost billions? Sometimes it learned by copying. Understand model distillation and the case that put the US and China on a collision course.

4 min read·Rafa Costa
What Is an AI "Harness"? The Invisible Piece That Takes AI From Chatting to Doing
Artificial Intelligence

What Is an AI "Harness"? The Invisible Piece That Takes AI From Chatting to Doing

There is a huge difference between an AI that only answers and one that does. What separates them is a quiet piece: the harness. Learn in plain language what it is and why it matters so much.

3 min read·Rafa Costa
What Are Transformers? The AI Architecture Behind ChatGPT, Explained for Beginners
Artificial Intelligence

What Are Transformers? The AI Architecture Behind ChatGPT, Explained for Beginners

In 2017, Google introduced the Transformer, the idea that changed artificial intelligence forever. Learn in plain language what Transformers are, how they work, and why they are the heart of ChatGPT and Gemini.

3 min read·Rafa Costa

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