---
title: "Tool Calling vs. Code Execution for AI Agents: Choosing the Right Action Primitive"
date: 2026-09-25
source: https://machinelearningmastery.com/tool-calling-vs-code-execution-for-ai-agents-choosing-the-right-action-primitive/
description: "Theory is easier to trust once it's running against a real API, so both examples in this article use the same tool — a get_weather function backed by <a href=\"https://open-meteo."
---

# Tool Calling vs. Code Execution for AI Agents: Choosing the Right Action Primitive

Theory is easier to trust once it's running against a real API, so both examples in this article use the same tool — a get_weather function backed by <a href="https://open-meteo.

*Published: 2026-09-25*