Aion-3.0 and WizardLM-2 8x22B 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.
WizardLM-2 8x22B, from Microsoft, has a 65,535-token context window and is priced at $0.62/M tokens input, $0.62/M tokens output on OpenRouter.