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Introduction

OpenCode is an open-source AI programming assistant supporting 75+ models and local deployment. With MixRoute API, you can use various mainstream and latest models (GPT, Claude, Gemini, etc.) in OpenCode with custom provider and model configuration. Download: https://opencode.ai/

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Quick Configuration

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1. Get API Key

Create and copy your API key from MixRoute Console.

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2. Configure Custom Provider in OpenCode

1

Open Settings

Open OpenCode, go to Server / Provider settings
OpenCode Provider Settings
2

Add Provider

Add Custom Provider (Configure an OpenAI compatible provider)
Add Custom Provider
3

Fill Configuration

Smart Routing is an intelligent model routing capability that automatically distributes requests to the most suitable model based on task complexity, reducing API costs while enhancing efficiency.See here for constraints and usage guide.
  • Provider ID: e.g., mixroute-route (lowercase, numbers, hyphens or underscores)
  • Display Name: e.g., Mixroute Api Route
  • Base URL: https://api.mixroute.ai/v1 (must end with /v1)
  • API Key: Paste your Mixroute Api Smart Routing node key
Note that Smart Routing node keys are independent and not shared with traditional API keys.
  • Provider ID: e.g., mixroute (lowercase, numbers, hyphens or underscores)
  • Display Name: e.g., Mixroute Api
  • Base URL: https://api.mixroute.ai/v1 (must end with /v1)
  • API Key: Paste your Mixroute Api key
4

Add Models

Add models you need (e.g., gpt-5.5, claude-opus-4-8)
5

Save and Use

Use ProviderID/ModelID format (e.g., mixroute/gpt-5.5)

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3. Switch Models

Select configured provider and model in chat or settings (e.g., mixroute/gpt-5.5).

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Models Requiring Responses API

Some models require Responses API instead of Chat Completions. If you see this error:
The chatCompletion operation does not work with the specified model
Error Example
Add "apiCompatibility": "responses" in your config file:
Config File Location
Configuration Success

Configuration Success Example

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Configuration Success Example

Below is an example of normal conversation using Mixroute Api in OpenCode:
OpenCode Conversation Example