Nemotron 3 Ultra and MiMo-V2.5-Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Nemotron 3 Ultra, from Nvidia, has a 262,144-token context window and is priced at $0.50/M tokens input, $2.20/M tokens output on OpenRouter.
MiMo-V2.5-Pro, from Xiaomi, has a 1,050,000-token context window and is priced at $0.3045/M tokens input, $0.609/M tokens output on OpenRouter.