Independent verdicts on AI tools

Reviews that say don't buy when the data does.

LLM Agents Explained: How They Work and When to Use Them
AI agents
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Theo Renn

A practical explainer on how LLM agents work, the tool-call loop, the failure modes, and when to choose an agent over a simpler approach.

Vector Database for RAG: A Practical Guide
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Theo Renn

A practical guide to vector database for rag — covering the key concepts, common patterns, and decisions that matter most.

Machine Learning Engineer Salary in 2026
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Aiden Park

What machine learning engineers actually earn in 2026: base pay, total compensation, and how it splits by seniority, location, and company.

How to Fine-Tune an LLM: Real Costs and When It's Worth It
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Theo Renn

A practical, cost-first guide to fine-tuning a large language model: what the GPU hours actually cost, the methods that matter, and when to.

Python for Data Science: A Complete Learning Path
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Aiden Park

A practical, structured learning path for using Python in data science — what to learn, in what order, and which tools matter.

RAG vs Fine-Tuning: How to Choose for Your Use Case
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Lena Voss

A decision framework for choosing between retrieval-augmented generation and fine-tuning, framed for engineers learning to build with LLMs.

OpenAI Codex: An Overview for Developers
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Maya Okafor

I installed OpenAI Codex alongside Claude Code in April 2026. Here's where the cloud-agent surface earns its place in a daily toolkit, and where it doesn't.

Claude vs. ChatGPT for Learners (2026 Rubric)
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Maya Okafor

Rubric-based comparison of Claude and ChatGPT for learners: explanation quality, source behavior, free-tier limits, and memory. Claims dated May 2026.

How AI-Assisted Analytics Workflows Actually Work in 2026
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Theo Renn

AI analytics copilots (Tableau Pulse, Power BI Copilot, ThoughtSpot Sage, Mode AI) reshape the analyst workflow. Here is where they fall short.

What Is a SQL Window Function (with Examples)?
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Lena Voss

A SQL window function calculates across rows related to the current row without collapsing them. Learn the syntax, common operators, and worked examples.

How to Read Research Papers as a Working Engineer
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Lena Voss

Practical techniques for reading research papers as an engineer, using Keshav's three-pass method to prioritize and translate findings.

What Is Retrieval-Augmented Generation (RAG)?
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Lena Voss

Retrieval-augmented generation (RAG) pairs a search index with a language model so answers cite specific documents. Not training-data recall.