Muse Spark 1.2 and Command A are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Muse Spark 1.2, from Meta, has a 1,048,576-token context window and is priced at $1.25/M tokens input, $4.25/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.