Hy-MT2-1.8B and GPT-5.6 Luna Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Hy-MT2-1.8B, from tencent, has a 8,192-token context window and is priced at $0.044/M tokens input, $0.177/M tokens output on OpenRouter.
GPT-5.6 Luna Pro, from OpenAI, has a 1,050,000-token context window and is priced at $0.20/M tokens input, $1.20/M tokens output on OpenRouter.