GPT-5.6 Sol Pro and MiniMax M3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.6 Sol Pro, from OpenAI, has a 1,050,000-token context window and is priced at $2.50/M tokens input, $15/M tokens output on OpenRouter.
MiniMax M3, from MiniMax, has a 1,048,576-token context window and is priced at $0.23/M tokens input, $0.96/M tokens output on OpenRouter.