OpenCode

An open-source coding agent for the terminal, desktop, and IDE with 75+ model providers

ターミナル開発ツールCoding AgentOpen SourceTerminalTrial

OpenCode is an open-source AI coding agent for the terminal, desktop, and IDE. It runs multiple sessions in parallel, loads the right LSPs automatically, supports 75+ model providers and local models, and can share session links for debugging or review.

公式サイトへ

更新日

2026-10-21

対応プラットフォーム

Windows / macOS / Linux

お試し

Freemium: OpenCode is open source and free to install, with free models included and support for your own provider API keys, including GitHub Copilot and ChatGPT Plus/Pro accounts. OpenCode Zen is an optional pay-as-you-go model gateway with a $20 starting balance, zero markups, and automatic top-up; confirm current model prices and limits on the official site.

* 料金は参考情報です。最新の料金は公式サイトをご確認ください

opencode.ai

OpenCodeの主な機能

Open-source Agent
Use the same open-source agent in the terminal, desktop app, or IDE extension.
Parallel Sessions
Start multiple agents on the same project and switch between them without losing context.
Any Model
Connect providers through Models.dev, or use GitHub Copilot and ChatGPT Plus/Pro accounts.
Share and LSP
Share a link to any session and let OpenCode load the right language servers automatically.

OpenCodeのおすすめ用途

Privacy-sensitive engineering teams

Run an open-source agent locally with your own providers; the site states it does not store code or context data.

Terminal-first developers

Keep parallel sessions, LSP context, and coding tasks in one terminal workflow.

Developers with existing model subscriptions

Reuse GitHub Copilot or ChatGPT Plus/Pro accounts, or connect 75+ providers instead of buying another model plan.

長所

Open source with free models included and free installation
Supports 75+ model providers and local models
Runs multiple sessions in parallel with LSP-aware context
Can reuse GitHub Copilot or ChatGPT Plus/Pro subscriptions

注意点

Model usage is billed separately by your provider or OpenCode Zen
Windows users are recommended to use WSL for the best experience
Using your own model providers requires API key configuration; Zen needs a separate account and balance

OpenCode のクイックスタートと実践のコツ

クイックスタート

1
Install the agent and start it inside one repository, then connect a provider you already pay for, such as GitHub Copilot or your own API key, before writing a prompt.
2
Open a second session for the same project instead of switching tasks in one thread: keep exploration in one session and the actual edit in another.
3
Let it read files through the LSP-backed context first, then ask for the change. Accurate symbols come from the language server, not from pasting file contents.

実践のコツ

Parallel sessions are the real advantage and also the easiest way to waste tokens. Give each session one goal and one directory, and start a fresh session when you switch tasks instead of stacking context. When a provider feels weak, switch models inside the same session before rewriting the prompt, because the surrounding context usually matters more than the model tier.