Command A and Solar Pro 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
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.
Solar Pro 4, from upstage, has a 524,288-token context window and is priced at $0.03/M tokens input, $0.12/M tokens output on OpenRouter.