OpenCode

Set up OpenCode to use Modelway.

Step 01

Get your Modelway key

Sign in, open API keys and click Create key. Copy it right away: it’s shown once. New to Modelway? Start with getting access.

Step 02

Install OpenCode

In PowerShell, with Scoop:

powershell

scoop install opencode

With Chocolatey, or npm if you have Node.js:

powershell

1choco install opencode
2npm install -g opencode-ai

OpenCode also recommends running it inside WSL, where you follow the Linux steps.

Step 03

Point it at Modelway

OpenCode reads its global config from %USERPROFILE%\.config\opencode\opencode.json. Create the folder if it doesn’t exist yet, then open the file in an editor:

powershell

1New-Item -ItemType Directory -Force "$env:USERPROFILE\.config\opencode"
2notepad "$env:USERPROFILE\.config\opencode\opencode.json"

Paste this in, with your key in place of the placeholder:

%USERPROFILE%\.config\opencode\opencode.jsonjson

1{
2  "model": "modelway/claude-sonnet-5",
3  "provider": {
4    "modelway": {
5      "npm": "@ai-sdk/anthropic",
6      "options": {"baseURL": "https://modelway.vip/v1", "apiKey": "<your Modelway API key>"},
7      "models": {
8        "claude-sonnet-5": {"attachment": true, "reasoning": true, "limit": {"context": 1000000, "output": 64000}}
9      }
10    }
11  }
12}

Step 04

Start OpenCode

Open a terminal in a project folder and run:

powershell

opencode

It starts on the model in model. Switch with /models.

FAQ

How do I add more models?

Add each model id from the catalog under models, next to the one that’s there. Set model to query/<id> to start on it.

How do I update?

Run opencode upgrade, or update it with the package manager you installed it with.