Bard is a user-facing product, Gemini is an internal/developer facing model. Bard is now backed by Gemini and its various forms, but used to be backed by PaLM/

Bard is a user-facing product, Gemini is an internal/developer facing model. Bard is now backed by Gemini and its various forms, but used to be backed by PaLM/2. Similarly, ChatGPT is a user-facing product, and GPT3, 3.5, 4, etc, are the developer facing models. OpenAI expose a bit more of the GPT branding to users allowing them to directly select the model in ChatGPT, but Google hasn't done this, I would guess for product reasons. The main distinction is that Bard/ChatGPT are fine-tuned to be conversational, whereas the raw models are not necessarily. For example, in Google Workspace you can have an LLM draft an email for you, but this is not Bard, it's not conversational, it doesn't chat back and forth, it takes a prompt and generates an email, which is what it was fine-tuned to do. Bard/ChatGPT can write emails, but they aren't explicitly trained to do so and will discuss the email with you more.