Building AI Agents with OpenCode and Free LLMs

> How to set up an autonomous AI coding agent for $0/month

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TL;DR

You can run a powerful AI coding agent completely free using:

OpenCode - Open-source AI coding CLI

OpenRouter - Free tier with top coding models

MiMo v2 Flash - Best free coding model (SWE-bench #1)

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Introduction

This post is a work in progress. Check back soon for the complete guide!

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What We're Building

An AI agent that can:

Read and understand your codebase

Make changes across multiple files

Run tests and fix failures

Respond to GitHub issues automatically

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The Stack

| Component | Tool | Cost | |-----------|------|------| | AI Agent | OpenCode | Free (open source) | | LLM Provider | OpenRouter | Free tier | | Model | MiMo v2 Flash | Free | | Automation | Cyrus + Linear | Free |

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Coming Soon

Step-by-step setup guide

OpenCode configuration

Free model comparison

Linear integration for automated issue handling

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Stay tuned! Follow me on LinkedIn for updates.