voyage-code-4 and GTE-Base are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
voyage-code-4, from voyageai, has a 32,000-token context window and is priced at $0.12/M tokens on OpenRouter.
GTE-Base, from thenlper, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.