Granite 4.0 Micro and Mistral Large 3 2512 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Granite 4.0 Micro, from ibm-granite, has a 131,000-token context window and is priced at $0.017/M tokens input, $0.112/M tokens output on OpenRouter.
Mistral Large 3 2512, from Mistral AI, has a 262,144-token context window and is priced at $0.50/M tokens input, $1.50/M tokens output on OpenRouter.