Nemotron 3 Ultra and Nemotron 3 Super 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.
Nemotron 3 Super, from Nvidia, has a 1,000,000-token context window and is priced at $0.085/M tokens input, $0.40/M tokens output on OpenRouter.