MiniMax M1 and Hermes 4 405B are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
MiniMax M1, from MiniMax, has a 1,000,000-token context window and is priced at $0.40/M tokens input, $2.20/M tokens output on OpenRouter.
Hermes 4 405B, from Nous Research, has a 131,072-token context window and is priced at $1/M tokens input, $3/M tokens output on OpenRouter.