E5-Large-v2 and Ministral 3 3B 2512 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
E5-Large-v2, from intfloat, has a 512-token context window and is priced at $0.01/M tokens on OpenRouter.
Ministral 3 3B 2512, from Mistral AI, has a 131,072-token context window and is priced at $0.10/M tokens input, $0.10/M tokens output on OpenRouter.