Multilingual-E5-Large and GPT-5.2 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Multilingual-E5-Large, from intfloat, has a 512-token context window and is priced at $0.01/M tokens on OpenRouter.
GPT-5.2, from OpenAI, has a 400,000-token context window and is priced at $1.75/M tokens input, $14/M tokens output on OpenRouter.