Claude Sonnet 4 with OpenCode via LLM Gateway

Model Overview

• Model ID: claude-sonnet-4-20250514
• Provider: Anthropic
• Strengths: Balanced speed and quality, daily coding tasks
• Context: 200K tokens

Configuration

Add to ~/.config/opencode/config.json:

{
  "provider": "openai-compatible",
  "apiKey": "your-llmgateway-api-key",
  "baseUrl": "https://api.llmgateway.io/v1",
  "model": "claude-sonnet-4-20250514"
}

Or via environment:

export OPENCODE_PROVIDER="openai-compatible"
export OPENCODE_API_KEY="your-llmgateway-api-key"
export OPENCODE_BASE_URL="https://api.llmgateway.io/v1"
export OPENCODE_MODEL="claude-sonnet-4-20250514"

Usage

opencode --model claude-sonnet-4-20250514 "write unit tests for this module"

Best Use Cases

• Daily coding assistance
• Writing tests
• Documentation generation
• Code explanations
• Quick refactoring

Pricing Tier

Mid-tier - excellent balance of cost and capability for regular use.