GPT-5.6 Terra Pro and Qwen3.7 Max are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.6 Terra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $1/M tokens input, $6/M tokens output on OpenRouter.
Qwen3.7 Max, from Qwen, has a 1,000,000-token context window and is priced at $1.475/M tokens input, $4.425/M tokens output on OpenRouter.