Olmo 3 7B Think and E5-Base-v2 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.
E5-Base-v2, from intfloat, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.