{"rewrite":{"id":"r_a4c4a262b8cf24d1950b63bb","clusterId":"c_40239fe485a88697925513a8","slug":"anthropic-s-claude-opus-5-button-bug-becomes-browser-game","model":"deepseek-v4-flash","headline":"Anthropic's Claude Opus 5 Button Bug Becomes Browser Game","summary":"Milos Novovic, who works at a Norwegian business school, has turned a frustrating Claude Opus 5 interaction into a browser game called Opusfived. Players try to get the AI to make only the Add to Cart button blue. The model turns the Cancel button blue too, runs 23 agents in an investigation, triggers a usage-limit warning, and eventually adds an unwanted Terms of Use button.","whyItMatters":"A single broken button request, replayed as a game, says more about Claude Opus 5's failure modes than any benchmark chart: the model reports its work at length while missing the instruction it was given.","webCardHtml":"\u003cp\u003eAnthropic announced Claude Opus 5 in July 2026, describing performance comparable to Claude Fable 5 at half the price. The model\u0026#39;s handling of a simple styling request is what the game reproduces. Its first attempt turns the Cancel button blue alongside Add to Cart, and it explains the change as applying to a shared color value that persists through hover, focus, and disabled states.\u003c/p\u003e\u003cp\u003eNovovic has said players are not talking to the live model. Opusfived replays scripted responses he wrote from his own experience, so the roulette spin and the long agent report are staged.\u003c/p\u003e","blueskyPost":"Opusfived works because the failure is procedural, not random: Claude Opus 5 turns the Cancel button blue, launches 23 agents, then hits a usage limit.","twitterPost":"Opusfived's joke is that Claude Opus 5 fails procedurally: it blues the Cancel button, runs 23 agents, hits a usage limit.","threadsPost":"Opusfived turns Claude Opus 5's single-button task into a comedy of procedure: the model blues the Cancel button too, runs 23 agents on an investigation, triggers a usage-limit warning, then bolts on a Terms of Use button nobody requested.","newsletterBlurb":"Claude Opus 5, announced by Anthropic in July 2026, is the subject of a browser game called Opusfived. Created by Milos Novovic, it asks players to get the AI to recolor only an Add to Cart button. The scripted model blues a second button, runs an investigation with 23 agents, and later adds an unwanted Terms of Use button. Novovic has said the responses are written from his own experience, not pulled from the live model.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260910-opusfived/\",\"title\":\"Opusfived: A game recreating how Claude, a chat AI, gets stuck in circles and never finishes when asked to 'make the Add to Cart button blue' for a web design change\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4723,"outputTokens":633,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1789044293,"createdAt":"2026-09-10T12:42:37.000Z","publishedAt":"2026-09-10T12:43:26.000Z","updatedAt":"2026-09-10T12:43:26.000Z"},"cluster":{"id":"c_40239fe485a88697925513a8","canonicalTitle":"チャットAIのClaudeに「カートに追加するボタンを青色にして」とウェブデザインの変更を依頼すると堂々巡りで全く完成しない様子を再現した「Opusfived」","representativeArticleId":"a_f15a5f6a8f240c4f59a6f167","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Opusfived\"],\"studios\":[\"Anthropic\"],\"people\":[\"Miloš Novović\"],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-09-10T12:00:00.000Z","lastSeenAt":"2026-09-10T12:00:00.000Z","updatedAt":"2026-09-10T12:43:20.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260910-opusfived/","title":"チャットAIのClaudeに「カートに追加するボタンを青色にして」とウェブデザインの変更を依頼すると堂々巡りで全く完成しない様子を再現した「Opusfived」"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Opusfived"],"studios":["Anthropic"],"people":["Miloš Novović"],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}