Opencode: An Open-Source Alternative to Claude for AI Coding Assistance 85

Opencode is an AI coding assistant for the Terminal, designed to provide developers with AI-assisted coding features. Its main function is to interact with various AI models through a terminal user interface (TUI), helping developers with coding tasks, debugging, and more.

Core Features

• Interactive terminal interface: Built on Bubble Tea, delivering a smooth terminal experience.

• Support for multiple AI providers: Including OpenAI, Anthropic Claude, Google Gemini, AWS Bedrock, Groq, Azure OpenAI, and OpenRouter.

• Session management: Save and manage multiple conversation sessions.

• Tool integration: The AI assistant can execute commands, search files, and modify code.

• Vim-style editor: Integrated text input functionality.

• Persistent storage: Uses an SQLite database to store conversations and sessions.

• Language Server Protocol (LSP) support: Provides code intelligence features.

• File change tracking: Tracks and visualizes file changes within sessions.

• External editor support: Use your preferred editor to compose messages.

• Custom commands: Create powerful custom commands with named parameters.

Supported AI Models

• OpenAI: GPT-4.1 series, GPT-4.5 preview, O1 series, O3 series, O4 Mini, and more.

• Anthropic: Claude 3.5 Sonnet, Claude 3.7 Sonnet, and more.

• Google: Gemini 2.5, Gemini 2.5 Flash, and more.

• AWS Bedrock: Claude 3.7 Sonnet.

• Groq: Llama 4 Maverick, Llama 4 Scout, and more.

• Azure OpenAI: Similar to OpenAI.

• Google Cloud VertexAI: Gemini 2.5, and more.

Installation

Using the install script:

curl -fsSL https://opencode.ai/install | bash

Using Homebrew (macOS and Linux):

brew install sst/tap/opencode

Using AUR (Arch Linux):

yay -S opencode-bin

Using Go:

go install github.com/sst/opencode@latest

Configuration

• The configuration file can be placed in the following locations:

• $HOME/.opencode.json

• $XDG_CONFIG_HOME/opencode/.opencode.json

• ./.opencode.json (current directory)

• Configuration via environment variables is supported, for example:

• ANTHROPIC_API_KEY: For Claude models

• OPENAI_API_KEY: For OpenAI models

• GEMINI_API_KEY: For Google Gemini models

• AWS_ACCESS_KEY_ID: For AWS Bedrock (Claude)

• AZURE_OPENAI_ENDPOINT: For Azure OpenAI models

Other Features

• Theme support: Multiple predefined themes are supported (such as catppuccin, dracula, monokai, etc.), and custom themes can also be created.

• MCP (Model Context Protocol): Supports extending the AI assistant's capabilities through external tools.

• LSP (Language Server Protocol): Supports code intelligence features such as error detection and code completion.

Differences from Claude Code:

• Open source: 100% open source and not tied to any provider. While Anthropic is recommended, it can also be used with OpenAI, Google, or local models.

• Terminal user experience: Focused on the terminal user interface, developed by a neovim user and the creator of terminal.shop, pushing the possibilities of the terminal.

• Architecture: Uses a client/server architecture that can be remotely controlled via a mobile app; the TUI frontend is just one possible client.

Official site:https://opencode.ai/

Repository:https://github.com/sst/opencode