{
  "slug": "the-internet-has-one-message-for-opus-5-shut-up",
  "title": "The internet has one message for Opus 5. Shut up",
  "date": "2026-08-06",
  "featuredClaim": "Opus 5 is Anthropic's smartest model yet, but its default verbosity is driving users to mute it.",
  "description": "Anthropic's Opus 5 model achieves the strongest benchmark scores yet, but users complain it's unnecessarily verbose and exhausting to read. The issue stems from removed guardrails that now expose the model's unfiltered tendencies. Users can solve this by creating custom output styles to control the model's communication tone.",
  "keyPoints": [
    "Opus 5 is Anthropic's strongest model by benchmarks but generates verbose, exhausting responses due to removed system prompt constraints",
    "The verbosity issue arose from cutting 80% of Claude Code's system prompt to eliminate contradictory rules, which inadvertently changed conversational style",
    "Custom output styles in Claude Code allow users to define communication preferences once per session, controlling tone and removing filler patterns",
    "Users can implement the 'no-slop' style template to receive direct, precise responses mimicking a senior engineer's communication"
  ],
  "topics": [
    {
      "id": "tools",
      "slug": "ai-tools",
      "label": "AI Tools",
      "description": "Practical tools and platforms for AI implementation"
    },
    {
      "id": "implementation",
      "slug": "ai-implementation",
      "label": "Implementation",
      "description": "Hands-on implementation techniques and frameworks"
    },
    {
      "id": "strategy",
      "slug": "ai-strategy",
      "label": "AI Strategy",
      "description": "Strategic planning and implementation approaches for AI adoption"
    }
  ],
  "claims": [
    "Anthropic removed over 80 percent of Claude Code's system prompt without hurting coding benchmark performance.",
    "Reddit users coined terms like Claudeslop and Benchslop to describe Opus 5's verbose responses.",
    "Contradictory rules in old system prompts caused the model to waste effort resolving conflicts.",
    "Claude Code's output styles feature lets users set a persistent voice for entire sessions.",
    "The no-slop output style template removes AI filler phrases and enforces direct engineer-style writing."
  ],
  "claimTitles": [
    "System Prompt Reduction",
    "Reddit's New Slang",
    "Contradictory Rules Waste Effort",
    "Output Styles Feature",
    "No-Slop Template"
  ],
  "originalUrl": "https://aiadopters.club/p/fix-opus-5-verbosity",
  "quote": "The model is not wrong more often. It is just exhausting to decode.",
  "keyStatistics": [
    {
      "stat": "80%+",
      "context": "Percentage of Claude Code's system prompt Anthropic removed with no measurable drop in coding evaluations."
    },
    {
      "stat": "6",
      "context": "Number of custom output style templates the author built for different conversational scenarios."
    },
    {
      "stat": "2 minutes",
      "context": "Estimated time required to set up a custom output style to control Opus 5's verbosity."
    }
  ],
  "supportingContext": "The analysis draws on Anthropic's own internal disclosure from a Claude Code team member explaining why system prompt rules were stripped, alongside crowdsourced reactions from Reddit threads and reviews documenting user frustration with Opus 5's verbosity. Practitioners can apply this by creating markdown-based output style files, such as the 'no-slop' template, and loading them once per session via Claude Code's /output-style command. This approach shifts control of tone and verbosity from Anthropic's default settings to the end user, requiring only a few minutes of setup. The method is particularly relevant for coding-focused workflows where contradictory legacy instructions previously caused inefficient, self-conflicting model behavior. However, the fix currently applies primarily to Claude Code environments rather than general chat interfaces, leaving open questions about broader applicability.",
  "canonicalUrl": "https://kbanc.com/claims-library/the-internet-has-one-message-for-opus-5-shut-up",
  "markdownUrl": "https://kbanc.com/md/claims-library/the-internet-has-one-message-for-opus-5-shut-up.md",
  "jsonUrl": "https://kbanc.com/api/claims/the-internet-has-one-message-for-opus-5-shut-up.json",
  "source": {
    "publisher": "AI Adopters Club",
    "title": "The internet has one message for Opus 5. Shut up",
    "url": "https://aiadopters.club/p/fix-opus-5-verbosity"
  }
}