Miloš Novković, who works at a business school in Norway, has released a game called "Opusfived" that replicates the process of attempting to change a web design using Claude Opus 5, announced by Anthropic in July 2026.
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Opusfived: A Game Replicating the Trial and Error of Web Design Changes with Claude Opus 5
This article is a translation. Read the Japanese original
In this game, players experience the humor and frustration of instructing an AI to turn an "Add to Cart" button on an online shopping site blue, only for the AI to make unintended changes or fail to achieve the goal by repeatedly conducting excessive research. According to Novković, the game does not involve real-time conversations with an actual AI but was manually crafted based on his own experiences.
Regarding this phenomenon, discussions have emerged in communities such as Hacker News about the tendency of recent AI models to over-verify tasks. One user stated that there are increasing cases where they are forced to give up on using a model because the verification is too granular, noting that Opus in particular can sometimes deviate from the main objective.