Olmo 3 7B Think and GPT-5.2 Pro 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.
GPT-5.2 Pro, from OpenAI, has a 400,000-token context window and is priced at $21/M tokens input, $168/M tokens output on OpenRouter.