OpenCode

What is it

OpenCode is a terminal-based agentic system that provides AI-powered code assistance through a TUI (Terminal User Interface). Unlike IDE-integrated tools like Cursor or JetBrains AI Assistant, OpenCode runs entirely in the terminal, making it lightweight, fast, and ideal for SSH workflows or environments without a graphical interface.

My Opinion

OpenCode is the agentic system for developers who live in the terminal. While everyone else is fighting over VS Code forks and Electron-based IDEs, OpenCode respects that some of us prefer the raw efficiency of TUI applications. It’s what AGENTS.md looks like in action—portable, lightweight, and model-agnostic.

The TUI Advantage

The terminal is faster. No Electron overhead, no GPU rendering, no 500MB of JavaScript for a text editor. OpenCode starts instantly, uses minimal memory, and integrates seamlessly with your existing terminal workflow.

If you’re SSH’d into a server, OpenCode is there. If you’re working over a slow connection, OpenCode still works. If you live in tmux, OpenCode feels like home.

The Model Flexibility

Unlike Claude Code (locked to Claude) or Cursor (primarily GPT-4), OpenCode lets you choose your model. Want to use Claude for complex reasoning and GPT-4 for quick completions? Done. Want to run a local LLM for privacy-sensitive code? Supported.

This flexibility is crucial as the “LLM King of the Hill” game continues rotating. Today’s best model might be tomorrow’s second-best.

The “No Context” Problem

The biggest limitation is that TUI applications don’t have deep IDE integration. OpenCode can’t analyze your entire project structure as easily as Cursor, and it can’t provide real-time syntax highlighting or inline suggestions. It’s more like a smart pair programmer you converse with than a code completion engine.

For some workflows, this is fine. For others, you’ll want a GUI tool alongside OpenCode.

The Agent Flexibility

OpenCode’s strength is its agentic approach. You can define complex multi-step tasks, and the agent breaks them down, executes them, and reports back. This is perfect for refactoring, debugging, or architectural discussions where you want an AI to think through the problem with you, not just autocomplete the next line.

The AGENTS.md format works seamlessly with OpenCode—your project instructions are respected without proprietary configuration.

The Learning Curve

If you’ve never used a TUI application before, OpenCode will feel alien. Keyboard navigation, split panes, and terminal-based interaction patterns are different from what most developers expect. But once you master it, you realize that mouse-driven IDEs are actually slower.

Conclusion

OpenCode is for the terminal-first developer who wants AI assistance without leaving their comfort zone. It’s not as feature-rich as GUI-based tools, but it’s faster, lighter, and works everywhere. If you live in tmux, think VS Code is bloated, and want model flexibility, OpenCode is your tool. For developers who prefer IDE integration, Cursor or Claude Code might be better fits.