# Reasoning Models From Scratch: Code Setup

> Source: <https://sebastianraschka.com/blog/2026/reasoning-models-and-agents-from-scratch.html>
> Published: 2026-08-30 08:42:39+00:00

# Reasoning Models From Scratch: Code Setup

A little video that

- explains the relationship between conventional LLMs and reasoning models (and agents),
- philosophizes about “from scratch” approaches,
- and explains how to install the Python and PyTorch requirements with
`uv`

.

The video is here: [Build A Reasoning Model From Scratch #1: Motivation & Code Setup](https://www.youtube.com/watch?v=Kh9mqTzjuEQ).

Source: website version of my [Substack note](https://substack.com/@rasbt/note/c-325854620).

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