E5-Large-v2 and Qwen Plus 0728 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.
Qwen Plus 0728, from Qwen, has a 1,000,000-token context window and is priced at $0.26/M tokens input, $0.78/M tokens output on OpenRouter.