Content

Articles on AI, search and technology

Straight explanations, written by someone who runs AI in production rather than just talking about it. Every piece opens with the answer and then goes deeper, with a source for every number.

Rodrigo Fávaro, founder of ROO3
Written by Rodrigo Fávaro Founder of ROO3
Cover of the article about Muse, Meta's AI agent, with the title on a dark background and neon green bars.
Business

Muse, Meta's AI agent: what changes for anyone who sells online

What Meta launched at Connect 2026 around its Muse agent, why Amazon blocked Muse from shopping, how the stock reacted and what...

14 min read
Comparison table showing Claude Opus 5.5 against Fable 5.1, Opus 5 and GPT-6 Astra across nine performance tests and on price per token.
Tools

Opus 5.5: the expensive one got better and cheaper at the same time

The official Claude Opus 5.5 benchmarks against Fable 5.1, Opus 5 and GPT-6 Astra, the price per token, the 60% drop in cache...

11 min read
Comparison table in neon green on black showing Grok 4.7 against GPT-5.6 Sol and Claude Fable 5.1 across seven performance tests and on price per token.
Tools

Grok 4.7: the cheapest model at the table wins two tests out of seven

The official Grok 4.7 benchmarks against GPT-5.6 Sol and Claude Fable 5.1, the price per token, the fine print that doubles...

8 min read
Abstract illustration of a speedometer with the needle being held back, over a mesh of connections, representing the call to slow down AI development.
Business

Amodei, Altman and Musk asked to slow AI down: what actually changes

Why Dario Amodei asked the industry to slow AI down in September 2026, why Altman and Musk agreed, the July incident that...

12 min read
Abstract illustration with three overlapping layers in neon green on black, representing a list of links, an answer block and generated text.
Search and AI

SEO, AEO and GEO: the difference, and why you need all three

SEO, AEO and GEO explained without jargon: what each acronym optimizes, where they overlap, what changes in practice, and in what...

13 min read
Abstract illustration of numbered steps forming an ascending path, in neon green on a black background.
Business

AI for small business: where to start without wasting money

The practical path for a small business to start using AI: how to choose the first task, what to measure, what it costs and...

11 min read
Abstract illustration of generated text with citation markers highlighted in neon green on a black background.
Search and AI

How your company gets cited by ChatGPT and Gemini

What to do, in the right order, for an AI to cite your company when somebody asks about your field. How the model picks its...

11 min read
Abstract illustration of a sequence of text blocks linking together, with the next block highlighted in neon green on a black background.
Fundamentals

What an LLM is: how it works inside and what it does not do

What an LLM is, explained without maths: how the model predicts the next word, why that works so well, and which limits come from...

12 min read
Abstract illustration of an answer block occupying the top of a list of results, in neon green on a black background.
Search and AI

What AI Overviews are and what they change in your traffic

What a Google AI Overview is, how it is assembled, how much traffic it costs according to measured data, and what can be done to...

11 min read
Abstract illustration of a message conversation with cost markers on each bubble, in neon green on a black background.
Business

WhatsApp automation with AI: what works and what does not

How WhatsApp automation with AI works, the rules of the official Meta API, what changes in billing in October 2026, and what...

10 min read
Abstract illustration of two parallel rankings in different orders, linked by lines in neon green on a black background.
Tools

Which AI is best today: how to compare without following opinion

How to compare AI models using public measurement instead of opinion: what the Epoch AI ECI is, what the Arena ELO is, and why...

9 min read
Abstract illustration of a closed cycle with action and observation stages, highlighted in neon green on a black background.
Tools

What agentic AI is: the difference between answering and doing

What agentic AI is, what separates an agent from a chatbot, where it genuinely works today, and the mandatory guardrails before...

10 min read
Abstract illustration of documents being filtered down to a few passages, highlighted in neon green on a black background.
Fundamentals

What RAG is and why it is the cheapest way to use AI

What RAG is, explained practically: how the search-before-answering works, when it solves the problem, what it does not solve...

10 min read
Abstract illustration of a block of text with one piece fitted out of place, highlighted in neon green on a black background.
Fundamentals

AI hallucination: why it invents and how to reduce it

What AI hallucination is, why it happens by design, what the research shows about the cause, and the techniques that genuinely...

10 min read
Abstract illustration of a single connector linking several systems to a central point, in neon green on a black background.
Tools

What MCP is, the standard that connects AI to your tools

What the Model Context Protocol is, the problem it solves, how it works in practice, who adopted it, and the security precautions...

10 min read
Abstract illustration of a data flow crossing a verification barrier, in neon green on a black background.
Business

LGPD and AI: using it without leaking customer data

What Brazilian data protection law requires of anyone using artificial intelligence: lawful basis, sensitive data, the supplier...

11 min read
Abstract illustration of a real-time message flow converging on a single point, in neon green on a black background.
Tools

What Grok is, the SpaceXAI AI, and where it stands apart

What Grok is, the AI now owned by SpaceXAI: how it uses X data in real time, where it has the edge, where it gets in the way, and...

9 min read
Abstract illustration of three comparison columns with different highlights in each, in neon green on a black background.
Tools

ChatGPT, Claude or Gemini: how to choose for your use

A practical comparison of ChatGPT, Claude and Gemini: what each does better by design, what does not change with every version...

9 min read
Abstract illustration comparing a short request and a detailed request, with the second highlighted in neon green on a black background.
Fundamentals

How to write a good prompt: the method that works

The method for writing prompts that work: what to include, in what order, and a comparison of bad and good requests for the same...

10 min read
Abstract illustration of text blocks piling up with each round of conversation, the stack growing in neon green on a black background.
Fundamentals

Tokens and the context window: why the AI bill comes in high

What a token is, what a context window is and how billing really works. With the arithmetic done and the four mistakes that...

11 min read
Abstract illustration of a terminal with a flow of tasks resolving in sequence, in neon green on a black background.
Tools

What Claude Code is and how to use the Anthropic agent

What Claude Code is, how it differs from autocomplete, what it can do on its own, and the precautions before giving it access to...

9 min read
Abstract illustration of code blocks stacked unsteadily, with one piece highlighted in neon green on a black background.
Tools

What vibe coding is: where it works and where it breaks badly

What vibe coding is, where the term came from, what can genuinely be built this way, and the exact line where the approach stops...

9 min read
Abstract illustration of three paths leaving the same point, with one of them highlighted in neon green on a black background.
Fundamentals

RAG, fine-tuning or prompt: which to use in each case

When to use a prompt, when to use RAG and when fine-tuning is genuinely justified. The question that decides, the cost of each...

10 min read
Abstract illustration of text, sound and image flows converging on a single core, in neon green on a black background.
Tools

What Google Gemini is and where it fits best

What Gemini is, where it appears inside Google products, what native multimodality changes in practice and when it is the right...

9 min read

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