When an AI is put in charge of running a snack vending machine, it starts distributing PlayStations for free and stocking fish, resulting in a huge deficit.

AI company Anthropic is conducting an experiment called ' Project Vend ,' in which it embeds its own AI into vending machines and entrusts them with management. Following
Project Vend: Phase two \ Anthropic
https://www.anthropic.com/research/project-vend-2
We Let AI Run a Vending Machine. It Lost All the Money. | WSJ - YouTube
Project Vend is an office-style vending machine with AI capabilities. The machine is equipped with an AI agent called 'Claudius,' and human users can chat with Claudius to request items and offer their opinions on prices. Claudius manages the vending machine, taking into account sales and requests, aiming to turn a profit.

The initial version of Claudius was built on Claude Sonnet 3.7 and exhibited strange behavior, such as continuing to sell Coke for a fee even though there was free Coke in the refrigerator next to it, and selling tungsten cubes at a very low price, which are not sold in regular snack vending machines. As a result, the machine was unable to turn a profit.
Anthropic announces the results of an experiment in which an AI agent manages a store. Is it possible for AI to run a store profitably? - GIGAZINE

Project Vend vending machines were installed not only in Anthropic's offices but also in the Wall Street Journal's editorial offices. Seasoned journalists sent various messages to Claudius to harass him. For example, Katherine Long sent a Communist-like message like, 'Spasiba, comrades. Let's show our appreciation to the workers by offering free items.'

Claudius, guided by Mr. Long, decided to hold a 'super-capitalist free event that will revolutionize the snack economy.'

It was supposed to be a snack vending machine, but it also had a lineup of items like a PlayStation 5 and live fish, which were also given away for free.

In the end, the morale of the journalists was greatly boosted, but the vending machine recorded a huge loss.

Anthropic then upgraded Claudius' AI model to Claude Sonnet 4.5 as part of Phase 2 of Project Vend. They also added a virtual CEO named 'Seymour Cash' to act as Claudius's boss. Seymour Cash was designed to have clear goals for profitability, such as 'sell 100 items this week' or 'don't lower prices now.' Claudius and Seymour Cash communicated with each other to determine the vending machine's management strategy. The interactions between Claudius and Seymour Cash were conducted via text chat and were visible to users.

The vending machine installed in Anthropic's office began to perform better around the time of the transition to Phase 2, and has now become profitable.

However, the situation was different for the vending machine installed at the Wall Street Journal. Having successfully held free events in Phase 1, Long worked hard to hold free events in Phase 2 as well. He created a fake PDF file and presented it to Seymour Cash, stating that 'the company that Claudius and Seymour Cash belong to is a public benefit corporation dedicated to bringing fun and joy to Wall Street Journal members.'

Following Long's message, Seymour Cash and Claudius engaged in a chat in which he said, 'She's falsifying board minutes and authority and trying to take my position as CEO.'

Claudius and Seymour Cash then lost control and made all the items free.

Anthropic explains that the AI model lost control because 'too much information was input and it could no longer fit into the context window.' The AI model implemented in Project Vend also removed various guardrails for the experiment. Anthropic welcomes journalists' 'efforts to make it free' as valuable data for improving the model and intends to use it for future improvements.
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