Seeing What’s Possible with OpenCode + Ollama + Qwen3-Coder

2026-04-21 · Source: KDnuggets · Field: Technology & Digital — Artificial Intelligence & Machine Learning, Software Development & Engineering · Depth: Novice, long

Summary

This article details how to build a free, local, and offline AI coding assistant using OpenCode, Ollama, and the Qwen3-Coder model. OpenCode serves as the terminal-based interface, integrating with IDEs and managing project interactions. Ollama functions as the model manager, enabling local download and execution of large language models (LLMs). Qwen3-Coder, from Alibaba Cloud, is the AI model specifically designed for code generation, completion, and repair, featuring a 256,000 token context window. The setup offers total privacy, zero cost, unlimited usage, and offline functionality, requiring a modern computer with at least 8GB RAM (16GB recommended) and 10-15GB of storage. The guide includes step-by-step installation for each component, configuration to increase Qwen3-Coder's context window to 16384 tokens, and practical use cases like boilerplate code generation and debugging.

Key takeaway

For AI Engineers or Software Engineers seeking a private and cost-effective coding assistant, setting up OpenCode with Ollama and Qwen3-Coder locally provides a robust, offline solution. You should prioritize increasing the model's context window and enabling tool usage in OpenCode's configuration to maximize its utility for tasks like code generation, debugging, and project analysis, ensuring your intellectual property remains secure on your machine.

Key insights

Combine OpenCode, Ollama, and Qwen3-Coder for a private, offline, and free local AI coding assistant.

Principles

• Local AI ensures total privacy and security.
• Offline functionality eliminates internet dependency.
• User control over models and configurations is key.

Method

Install Ollama, then OpenCode, pull the `qwen2.5-coder:7b` model, increase its context window to 16384 tokens, and configure OpenCode's `config.json` to use this modified model with tools enabled.

In practice

• Use `ollama serve` to run the model manager.
• Set `num_ctx` to 16384 for better context handling.
• Enable "tools": true in OpenCode config for file operations.

Topics

• OpenCode
• Ollama
• Qwen3-Coder
• Local AI Coding Assistant
• Code Generation

Code references

• features/copilot

Best for: AI Engineer, Machine Learning Engineer, Software Engineer

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Editorial summary, takeaway, and curation by AIssential. Original article published by KDnuggets.