bge-m3 and Step3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
bge-m3, from baai, has a 8,194-token context window and is priced at $0.01/M tokens on OpenRouter.
Step3, from stepfun-ai, has a 65,536-token context window and is priced by the provider serving it on OpenRouter.