MiniMax M2.7 and Solar Pro 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
MiniMax M2.7, from MiniMax, has a 204,800-token context window and is priced at $0.24/M tokens input, $0.96/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.