Olmo 3 7B Think 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.
Olmo 3 7B Think, from Ai2, has a 65,536-token context window and is priced by the provider serving it 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.