David Walker is well aware that large language models such as ChatGPT, which was trained on the entire internet, can hallucinate. They can even make up historical events that never happened.
“They can tell lies, they can make up information,” said Walker, who is chief technology officer of Westpac, in an interview. “They’re incredibly powerful.”
The bank, which is based in Sydney and has more than 12 million customers, can’t afford to let a public version of ChatGPT make up or hallucinate answers for customers or employees who use a virtual assistant. GPT (generative pre-trained transformer)…
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