Connect NordRouter to Antigravity

Antigravity currently does not let you connect a third-party OpenAI-compatible API to its built-in agent. The working method is to install Cline from Open VSX inside the Antigravity editor and configure NordRouter in Cline.

Important

Do not add unofficial antigravity.openai-compatible.* keys to settings.json. The built-in agent does not support them and will continue using Google's models.

Setup

1. Open Antigravity IDE.
2. Open Extensions (Ctrl+Shift+X / Cmd+Shift+X).
3. Find Cline (saoudrizwan.claude-dev) in Open VSX and install it.
4. Open Cline, select Settings → API Provider → OpenAI Compatible.
5. Enter:

Base URL: https://global-api.nordrouter.com/v1
API Key:  sk-nr-YOUR-KEY
Model ID: anthropic/claude-sonnet-4.6

6. In Russia you can use https://nordrouter.com/v1 instead.
7. Save the profile, switch to Ask mode and send: Reply with one word: working.

Create the key in the dashboard and copy the full Model ID from the Models page. If Cline does not load a model list, type the ID manually.

NordRouter runs in the Cline panel inside Antigravity. Antigravity's built-in model picker remains separate and does not control the NordRouter model.

Official references: Antigravity editor extensions, Cline on Open VSX, and the current BYOK status.