Aion-3.0 and Command A are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Aion-3.0, from Aion Labs, has a 131,072-token context window and is priced at $3/M tokens input, $6/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.