E5-Large-v2 and MiniMax M2 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.
MiniMax M2, from MiniMax, has a 204,800-token context window and is priced at $0.255/M tokens input, $1.02/M tokens output on OpenRouter.