GPT-5 Pro and MiMo-V2-Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5 Pro, from OpenAI, has a 400,000-token context window and is priced at $15/M tokens input, $120/M tokens output on OpenRouter.
MiMo-V2-Flash, from Xiaomi, has a 262,144-token context window and is priced by the provider serving it on OpenRouter.