OpenCode vs Grok Build: Features, Pricing and User Reviews 2026

OpenCode is a free, open source AI coding agent made for developers. It works in your terminal, as a desktop app, inside popular code editors, and through a local web interface.

You can talk to it in plain language to write new code, fix bugs, refactor messy code, and make sense of large codebases. Rather than just guessing, it explores your project first, plans the needed changes, and then uses tools such as file editing, search, and shell commands to finish the task.

It supports over seventy five AI model providers, from big paid services to free local models, so you can choose what fits your budget. Since it does not store your code or data, it also works well for privacy focused teams.

Grok Build is xAI's terminal based coding agent that helps you plan, write, and fix code right from the command line. You describe what you want to build or fix, and it reads your codebase, makes a plan, edits files, runs commands, and tests the results.

It works as a full screen terminal app with plan review, inline diffs, and support for background tasks. Grok Build can hand off big jobs to smaller helper agents that work in parallel, and it connects to outside tools like Linear, Sentry, and Postgres through MCP servers.

It is powered by Grok 4.5 and is free and open source, so teams can run it with their own models too.