OpenCode

OpenCode is an open source AI coding agent that helps developers write code from the terminal, an IDE extension or a desktop app. It is aimed at working programmers who want an agent that is not tied to a single model vendor. The tool loads the appropriate language servers automatically so the model works with real code intelligence, and it supports multiple sessions so several agents can run in parallel on the same project. Sessions can be shared through links for reference or debugging. Models are connected from any provider, including Claude, GPT and Gemini, with access to more than 75 providers through Models.dev, local models included. Users can sign in with GitHub to use a GitHub Copilot account, or with OpenAI to use a ChatGPT Plus or Pro account. Some free models are included. The vendor states that it does not store code or context data, which it presents as suitable for privacy sensitive environments. OpenCode also runs Zen, a model service offering a curated set of models the team has tested and benchmarked for coding agents. Zen is billed per request with no markup, from a prepaid balance. The site shows a $20 balance with a $1.23 card processing fee, optional automatic top up of $20 when the balance falls to $5, and configurable monthly spend limits. Per model rates are listed on the Zen page. The site also links a plan called Go, but shows no price for it, and the answer to its own question about what OpenCode costs is not displayed on the home page. The software itself is open source, with the code hosted on GitHub.