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Deep dives into AI engineering, LLM benchmarks, agent architectures, and the evolving landscape of AI-assisted software development.

Featured๐Ÿค– Agents๐ŸŠ Deep Dive๐Ÿท๏ธ Tutorial

How to Build an AI Agent from Scratch

We built a working AI agent from an empty file, no frameworks, no abstractions, just an LLM, a loop, and some tools. Here's exactly how it works, where it breaks, and what we learned about making agents reliable.

February 19, 202625 min readby LeetLLM Team
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๐Ÿ”ฌ Research๐ŸŠ Deep Dive๐Ÿข Industry

RAG vs Fine-Tuning vs Prompting

Every LLM project starts with the same question: should you use RAG, fine-tune the model, or just write better prompts? We present a practical decision framework with real cost numbers, accuracy benchmarks, and case studies to help you choose.

February 19, 202615 min
๐Ÿ“Š Benchmarks๐Ÿ“ Evaluation๐Ÿงช SWE-bench

Understanding SWE-bench

SWE-bench has become the gold standard for measuring AI coding agents, but what does it actually test? We break down the benchmark methodology, its variants, scoring mechanics, and what the leaderboard results really mean for production engineering.

February 17, 202612 min
๐Ÿข Industry๐ŸŠ Deep Dive

What Does an AI Engineer Actually Do?

AI Engineer is the fastest-growing role in tech, but what does the job actually look like day-to-day? We break down the skills, tools, and career paths that define the role in 2026, from RAG pipelines to agent architectures.

February 19, 20266 min
๐Ÿข Industry๐ŸŠ Deep Dive๐Ÿ”ฌ Research

Mastering ML & LLM Engineering in 2026

The ML engineering landscape has shifted dramatically with the rise of LLMs. We break down what top companies actually build, how to structure your learning, and the key systems topics that differentiate engineers in 2026.

February 16, 202610 min