Meena by Google
Meena is an end-to-end, neural conversational model that learns to respond sensibly to a given conversational context. The training objective is to minimize perplexity, the uncertainty of predicting the next token (in this case, the next word in a conversation).
At its heart lies the Evolved Transformer seq2seq architecture, a Transformer architecture discovered by evolutionary neural architecture search to improve perplexity. Find out more about it in Google’s AI blog.
Replika
Replika was founded by Eugenia Kuyda with the idea to create a personal AI that would help you express and witness yourself by offering a helpful conversation. It’s a space where you can safely share your thoughts, feelings, beliefs, experiences, memories, dreams — your “private perceptual world.”
Essentially, Replika is a chatbot that while talking to you, gradually learns to imitate you till it becomes you.
Tay by Microsoft
Tay was an artificial intelligence chatter bot that was originally released by Microsoft Corporation via Twitter on March 23, 2016; it caused subsequent controversy when the bot began to post inflammatory and offensive tweets through its Twitter account, causing Microsoft to shut down the service only 16 hours after its launch. It has since been seen as a case study on how user interaction can ruin chatbots.
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