OpenCode - API易文档中心

Overview

OpenCode is a fully open-source AI coding agent built with TypeScript and AI SDK, offering terminal TUI, IDE integration, and desktop applications. The project has 94.9k+ stars on GitHub with an active community. By configuring API易 service, you can get:

🖥️ Multi-Platform Support

Terminal TUI, VS Code extension, and desktop apps

🔌 75+ Model Support

Supports 75+ LLM providers via Models.dev

🛠️ Built-in LSP

Language Server Protocol support for intelligent code understanding

🔄 Multi-Session Parallel

Parallel session processing and session sharing

Project Info: OpenCode is an actively maintained open-source project. Website: opencode.ai, Repository: github.com/anomalyco/opencode.

Prerequisites

Install OpenCode

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

npm i -g opencode-ai@latest

brew install anomalyco/tap/opencode

Scoop:

scoop install opencode

Chocolatey:

choco install opencode

paru -S opencode-bin

Download the desktop app for your system from opencode.ai:

macOS (Apple Silicon / Intel)
Windows
Linux (AppImage / deb)

Verify installation:

opencode --version

Quick Configuration

OpenCode uses JSON configuration files with multiple config locations (priority from low to high):

Remote config (.well-known/opencode)
Global config: ~/.config/opencode/opencode.json
Custom config: path specified by OPENCODE_CONFIG environment variable
Project config: opencode.json in project root
.opencode directory config
Inline config: OPENCODE_CONFIG_CONTENT environment variable

Method 1: Custom Provider (Recommended)

Create or edit the config file ~/.config/opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "apiyi": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "API易",
      "options": {
        "baseURL": "https://api.apiyi.com/v1",
        "apiKey": "{env:APIYI_API_KEY}"
      },
      "models": {
        "claude-sonnet-4-20250514": {
          "name": "Claude Sonnet 4",
          "limit": { "context": 200000, "output": 8192 }
        },
        "gpt-4.1": {
          "name": "GPT-4.1",
          "limit": { "context": 1047576, "output": 32768 }
        },
        "deepseek-chat": {
          "name": "DeepSeek V3",
          "limit": { "context": 65536, "output": 8192 }
        },
        "gemini-2.5-pro-preview-05-06": {
          "name": "Gemini 2.5 Pro",
          "limit": { "context": 1048576, "output": 65536 }
        }
      }
    }
  },
  "model": "apiyi/claude-sonnet-4-20250514"
}

Then set the environment variable:

macOS/Linux
Windows

# zsh
echo 'export APIYI_API_KEY="sk-your-apiyi-key"' >> ~/.zshrc
source ~/.zshrc

# bash
echo 'export APIYI_API_KEY="sk-your-apiyi-key"' >> ~/.bashrc
source ~/.bashrc

PowerShell:

[System.Environment]::SetEnvironmentVariable('APIYI_API_KEY', 'sk-your-apiyi-key', 'User')

Or add APIYI_API_KEY in System Environment Variables.

Method 2: /connect Command Authentication

OpenCode provides the /connect command to quickly connect new providers:

After starting OpenCode, type /connect
Select “Other”
Enter provider ID (e.g., apiyi)
Enter API key

Then add the provider and models definition in the config file to use.

Method 3: Override Existing Provider

For quick setup, override the built-in OpenAI provider’s baseURL:

{
  "provider": {
    "openai": {
      "options": {
        "baseURL": "https://api.apiyi.com/v1",
        "apiKey": "{env:APIYI_API_KEY}"
      }
    }
  }
}

Method 4: Project-Level Configuration

Create opencode.json in your project root for project-specific settings:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "apiyi": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "API易",
      "options": {
        "baseURL": "https://api.apiyi.com/v1",
        "apiKey": "{env:APIYI_API_KEY}"
      },
      "models": {
        "claude-sonnet-4-20250514": {
          "name": "Claude Sonnet 4",
          "limit": { "context": 200000, "output": 8192 }
        }
      }
    }
  },
  "model": "apiyi/claude-sonnet-4-20250514"
}

Agent System

OpenCode has three built-in agents, each with specific purposes:

Agent	Description	Usage
build	Default agent with full access, handles code generation and modification	Direct conversation
plan	Read-only agent for code analysis and planning, won’t modify files	`/plan` command
general	Complex search sub-agent for multi-step information retrieval	`@general` invocation

Agent Model Configuration

Configure different models for different agents:

{
  "provider": {
    "apiyi": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "API易",
      "options": {
        "baseURL": "https://api.apiyi.com/v1",
        "apiKey": "{env:APIYI_API_KEY}"
      },
      "models": {
        "claude-sonnet-4-20250514": {
          "name": "Claude Sonnet 4",
          "limit": { "context": 200000, "output": 8192 }
        },
        "deepseek-chat": {
          "name": "DeepSeek V3",
          "limit": { "context": 65536, "output": 8192 }
        },
        "gpt-4.1-mini": {
          "name": "GPT-4.1 Mini",
          "limit": { "context": 1047576, "output": 32768 }
        }
      }
    }
  },
  "agents": {
    "build": {
      "model": "apiyi/claude-sonnet-4-20250514"
    },
    "plan": {
      "model": "apiyi/deepseek-chat"
    },
    "general": {
      "model": "apiyi/gpt-4.1-mini"
    }
  }
}

Recommended Models

OpenCode supports 200+ AI models through API易. Choose the right model for different tasks.

View Programming Model Recommendations

Check the latest programming model recommendations, performance comparisons, and usage suggestions. Includes top-tier models, cost-effective options, and reasoning-enhanced models.

Scenario-Based Model Recommendations

Agent	Purpose	Recommended Model
build	Code generation and modification	Claude Sonnet 4, GPT-4.1
plan	Task planning and analysis	DeepSeek V3, Gemini 2.5 Pro
general	Quick search and Q&A	GPT-4.1 Mini (low cost)

Core Features

Terminal Interactive Interface

Start OpenCode to enter the interactive TUI:

# Start in current directory
opencode

# Specify project directory
opencode /path/to/project

File Operations

OpenCode can read, search, and modify project files:

> View the contents of src/index.ts

> Search for all files containing "TODO" in the project

> Refactor the calculateSum function in utils.ts to a more efficient implementation

Command Execution

Execute commands in the terminal and view results:

> Run npm test and analyze the failed tests

> Execute npm install and check for dependency conflicts

Session Management

Multi-session parallel: Run multiple sessions simultaneously
Session sharing: Export and share sessions
Auto-save: All sessions are automatically persisted
Context retention: Maintain complete conversation context during sessions

Usage Tips

1. Keyboard Shortcuts

Shortcut	Function
`Ctrl+C`	Interrupt current operation
`Ctrl+D`	Exit OpenCode
`Tab`	Auto-complete
`↑/↓`	Browse command history

2. Common Commands

Command	Function
`/connect`	Connect new Provider
`/model`	Switch current model
`/plan`	Use plan agent for analysis
`/clear`	Clear current session
`/help`	View help information

3. Invoke Sub-Agent

Use @general to invoke the search sub-agent for complex queries:

> @general Find all files handling user authentication in the codebase and summarize their functions

4. Incremental Development

{/* Step 1: Generate basic framework */}
> Create a basic REST API structure

{/* Step 2: Add specific features */}
> Add user authentication middleware

{/* Step 3: Refine details */}
> Add request parameter validation and error handling

Troubleshooting

Failed to connect to API易

Check if environment variable is set correctly:

echo $APIYI_API_KEY  # macOS/Linux
echo %APIYI_API_KEY%  # Windows

Verify baseURL in configuration file:

"baseURL": "https://api.apiyi.com/v1"

Test API connectivity:

curl -H "Authorization: Bearer $APIYI_API_KEY" \
     https://api.apiyi.com/v1/models

Model not found error

Verify the model ID is correct. Check the API易 console for supported models.Common model IDs:

claude-sonnet-4-20250514
gpt-4.1
deepseek-chat
gemini-2.5-pro-preview-05-06

Configuration file not taking effect

Configuration file loading priority (from low to high):

Remote config (.well-known/opencode)
Global config: ~/.config/opencode/opencode.json
OPENCODE_CONFIG environment variable
Project config: opencode.json
.opencode directory config
OPENCODE_CONFIG_CONTENT environment variable

Ensure the config file is in the correct location with valid JSON format.

Slow response

Try using a lighter model (e.g., GPT-4.1 Mini)
Reduce context length, start a new session
Check network connection stability

Best Practices

1. Model Selection Strategy

Task Type	Recommended Model	Reason
Complex code generation	Claude Sonnet 4	Strong coding ability, good context understanding
Code review	GPT-4.1	Strong analytical ability, good attention to detail
Quick Q&A	DeepSeek V3	Fast response, cost-effective
Long document analysis	Gemini 2.5 Pro	Supports ultra-long context

2. Effective Prompts

❌ Poor prompt: Help me write code

✅ Good prompt: Write an HTTP middleware in TypeScript that
logs requests, including request method, path,
response time, and status code, using pino for output

3. Security Considerations

Don’t hardcode API keys in code
Use environment variables to manage sensitive information
Review AI-generated code, especially security-related parts
Be careful not to let AI execute dangerous system commands

4. Cost Control

Configure different models for different agents (strong models for build, lightweight for general)
Use lightweight models for simple tasks
Regularly check API易 console to monitor usage

Alternatives

If OpenCode doesn’t meet your needs, consider these tools:

Claude Code

Anthropic’s official terminal programming assistant

Codex CLI

OpenAI’s official command-line tool

Gemini CLI

Google’s official terminal programming assistant

Roo Code

VS Code AI programming extension

API易 Console

Manage API keys and view usage

Model Recommendations

View programming scenario model recommendations

Overview

Conversational AI

Programming

Engineering

Translation

​Overview

🖥️ Multi-Platform Support

🔌 75+ Model Support

🛠️ Built-in LSP

🔄 Multi-Session Parallel

​Prerequisites

​Install OpenCode

​Quick Configuration

​Method 1: Custom Provider (Recommended)

​Method 2: /connect Command Authentication

​Method 3: Override Existing Provider

​Method 4: Project-Level Configuration

​Agent System

​Agent Model Configuration

​Recommended Models

View Programming Model Recommendations

​Scenario-Based Model Recommendations

​Core Features

​Terminal Interactive Interface

​File Operations

​Command Execution

​Session Management

​Usage Tips

​1. Keyboard Shortcuts

​2. Common Commands

​3. Invoke Sub-Agent

​4. Incremental Development

​Troubleshooting

​Best Practices

​1. Model Selection Strategy

​2. Effective Prompts

​3. Security Considerations

​4. Cost Control

​Alternatives

Claude Code

Codex CLI

Gemini CLI

Roo Code

​Related Resources

API易 Console

Model Recommendations

Overview

Prerequisites

Install OpenCode

Quick Configuration

Method 1: Custom Provider (Recommended)

Method 2: /connect Command Authentication

Method 3: Override Existing Provider

Method 4: Project-Level Configuration

Agent System

Agent Model Configuration

Recommended Models

Scenario-Based Model Recommendations

Core Features

Terminal Interactive Interface

File Operations

Command Execution

Session Management

Usage Tips

1. Keyboard Shortcuts

2. Common Commands

3. Invoke Sub-Agent

4. Incremental Development

Troubleshooting

Best Practices

1. Model Selection Strategy

2. Effective Prompts

3. Security Considerations

4. Cost Control

Alternatives

Related Resources