Gemma 4 31B and Qwen3.6 Plus are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Gemma 4 31B, from Google, has a 262,144-token context window and is priced at $0.08/M tokens input, $0.35/M tokens output on OpenRouter.
Qwen3.6 Plus, from Qwen, has a 1,000,000-token context window and is priced by the provider serving it on OpenRouter.