As Westpac chief executive Anthony Miller works away on his laptop, there is a new addition to his home screen, which is there to remind him not to get carried away with his use of artificial intelligence.An AI token tracker gives him a running tally of how many tokens he is using with his questions to chatbots, strategy simulations and other AI agent tasks. He has told colleagues it is about keeping the fact that each interaction costs money at the front of his mind, so he can judge if Westpac is getting a return on its investment.Paul Smith edits the technology coverage and has been a leading writer on the sector for 20 years. He covers big tech, artificial intelligence, business use of tech, the fast-growing Australian tech industry and start-ups, and national innovation policy from our Sydney newsroom. Send tips to @sayssmithy.99 on encrypted messaging platform Signal.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber?