A fair bit. EmbeddingGemma is open weights and allows for 128-768 dimensions.

It's not as simple as more dimensions = better, due to size, efficiency, and context rot limitations though.

Introducing EmbeddingGemma: The Best-in-Class Open Model for On-Device Embeddings - Google Developers Blog - https://developers.googleblog.com/en/introducing-embeddinggemma/