Nemotron 3 Ultra and Command A 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.
Command A, from Cohere, has a 256,000-token context window and is priced at $2.50/M tokens input, $10/M tokens output on OpenRouter.