GPT-5.1 and Qwen3 Max are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.1, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.
Qwen3 Max, from Qwen, has a 262,144-token context window and is priced at $0.78/M tokens input, $3.90/M tokens output on OpenRouter.