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🔅 DeepSeek Harness Tutorial: Free & Paid Models with OpenRouter + Real Coding

In this tutorial, I’ll show you how to install DeepSeek Harness, connect it to OpenRouter, and set up both free and paid AI models.

We’ll test everything with real requests, explore the different agent modes and plugins, and inspect the Trajectory to see exactly which steps and tools the agent used.

Finally, I’ll give it a real coding challenge and see if it can build and test a complete JavaScript task manager.

Timestamps:

00:00 - DeepSeek Harness Tutorial Overview
01:09 - What Is an AI Agent Harness?
01:52 - How to Install DeepSeek Harness
03:29 - DeepSeek Harness Workspace Setup
04:04 - Connect OpenRouter to DeepSeek Harness
04:50 - Find Free AI Models on OpenRouter
05:28 - Create an OpenRouter API Key
06:11 - Add GLM Models to DeepSeek Harness
07:27 - Test Free and Paid OpenRouter Models
08:27 - DeepSeek Harness Agent Modes and Plugins
10:06 - Create Custom AI Agent Presets
11:02 - Inspect Agent Trajectory and Tool Calls
12:57 - Real AI Coding Agent Challenge
13:29 - Build and Test a JavaScript Task Manager
14:38 - DeepSeek Harness Tips and Final Review

👀 Didn't know Microsoft had a whole page of free AI tools lol

You can generate stickers, edit photos, design rooms, create social media posts, and a bunch of other stuff.

Some are actually pretty useful, so might be worth checking out!

🔗 https://www.bing.com/tools/ai