Nova Premier 1.0 and LFM2.5-1.2B-Thinking are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Nova Premier 1.0, from Amazon, has a 1,000,000-token context window and is priced at $2.50/M tokens input, $12.50/M tokens output on OpenRouter.
LFM2.5-1.2B-Thinking, from Liquid, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.