Claude Haiku 4.5 and Multilingual-E5-Large are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Haiku 4.5, from Anthropic, has a 200,000-token context window and is priced at $1/M tokens input, $5/M tokens output on OpenRouter.
Multilingual-E5-Large, from intfloat, has a 512-token context window and is priced at $0.01/M tokens on OpenRouter.