Hey, OpenRouter isn’t officially supported by Cursor, so compatibility issues with models like Qwen3 are expected.
Supported BYOK (Bring Your Own Key) providers are OpenAI, Anthropic, Google, Azure OpenAI, and AWS Bedrock. You can set them up in Cursor Settings > Models. More details here: API keys documentation
Qwen isn’t available through any of these supported providers, so right now there’s no reliable way to use it via Cursor’s built-in AI features.
As for the Qwen Code Companion extension, it’s a third-party VS Code extension and works independently from Cursor’s AI features. We can’t support its setup, but you can try contacting the extension developers (QwenLM) if you run into issues.
Related thread: Cursor is practically unusable with any new models through OpenRouter