OpenCode

OpenCode is an open-source terminal coding agent with BYOK (Bring Your Own Key).

Overview


Type	CLI
Open Source	Yes
Best For	BYOK, customization, self-hosting

Key Features

BYOK — Use any API provider
Agentic — File editing, terminal commands
MCP Support — External tool integration
Customizable — Extensive configuration options
Session Management — Resume conversations

Installation

# npm
npm install -g opencode

# Or run directly
npx opencode

Access Model

OpenCode is open source and BYOK. There is no vendor subscription layer; your access terms come from whichever provider or local runtime you connect.

Privacy

Setting	Value
Open Source	Yes (auditable)
Training	None (BYOK)
Data Storage	Local only
Jurisdiction	Your API provider

Supported Providers

OpenAI
Anthropic
Google (Gemini)
AWS Bedrock
Azure OpenAI
Ollama (local)
Any OpenAI-compatible endpoint

Getting Started

# Set API key
export ANTHROPIC_API_KEY=sk-...

# Start in your project
cd your-project
opencode

# Or with specific provider
opencode --provider anthropic --model claude-sonnet-4-5

Configuration

Create opencode.config.json:

{
  "provider": "anthropic",
  "model": "claude-sonnet-4-5-20250514",
  "mcpServers": {
    "filesystem": {
      "command": "npx",
      "args": ["-y", "@anthropic/mcp-filesystem"]
    }
  }
}

MCP Integration

OpenCode supports MCP servers for extended capabilities:

# Add GitHub integration
opencode --mcp github

# Add database access
opencode --mcp postgres

Key Commands

Command	Action
`/clear`	Clear context
`/session list`	Show saved sessions
`/session load <id>`	Resume session
`/compact`	Summarize and compress context

Tips

Use Ollama for 100% local, offline operation
Configure MCP servers for extended capabilities
Use /compact to manage long conversations
Session management enables pausing/resuming work