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PaLM 2 is a family of language models, optimized for ease of use on key developer use cases. The PaLM family of models includes variations trained for text and chat generation as well as text embeddings. This guide provides information about each variation to help you decide which is the best fit for your use case.
Notes: "We’ll be making PaLM 2 available in four sizes from smallest to largest: Gecko, Otter, Bison and Unicorn. Gecko is so lightweight that it can work on mobile devices and is fast enough for great interactive applications on-device, even when offline" (https://blog.google/technology/ai/google-palm-2-ai-large-language-model/).