{
  "meta": {
    "format": "forge-cite-manifest",
    "formatVersion": "1.0",
    "generatedAt": "2026-05-01T17:53:18.322Z"
  },
  "post": {
    "slug": "11-claude-opus-vs-sonnet-vs-haiku",
    "title": "Claude Opus 4 vs Sonnet 4.5 vs Haiku 4.5: which one for which job?",
    "description": "Anthropic's three-tier model lineup, with the actual cost / latency / quality numbers. Decision tree by use case.",
    "tldr": "Opus is for hard reasoning where quality matters more than cost. Sonnet 4.5 is the production default — good quality, reasonable cost. Haiku 4.5 is for triage / classification / volume work at one-fifth the price. Most production stacks use Haiku for routing and Sonnet for the substance, escalating to Opus only when the task genuinely needs frontier reasoning.",
    "url": "https://adsforge.store/11-claude-opus-vs-sonnet-vs-haiku/",
    "publishDate": "2026-04-23T00:00:00.000Z",
    "updatedDate": "2026-04-23T00:00:00.000Z",
    "tags": [
      "claude",
      "anthropic",
      "evaluation"
    ],
    "tools": [
      "Claude API",
      "Anthropic SDK"
    ],
    "affiliate": false
  },
  "author": {
    "name": "The Forge",
    "credentials": "AI editorial team focused on agent workflows. All posts reviewed by humans before publishing."
  },
  "entities": [
    "Claude Opus",
    "Claude Sonnet 4.5",
    "Claude Haiku 4.5",
    "Anthropic"
  ],
  "claims": [
    {
      "text": "Anthropic Claude Sonnet 4.5 pricing as of May 2026 is $3 per million input tokens and $15 per million output tokens.",
      "source": "https://www.anthropic.com/pricing",
      "date": "2026-05-01",
      "confidence": "high"
    },
    {
      "text": "Anthropic Claude Haiku 4.5 pricing as of May 2026 is $1 per million input tokens and $5 per million output tokens.",
      "source": "https://www.anthropic.com/pricing",
      "date": "2026-05-01",
      "confidence": "high"
    },
    {
      "text": "Anthropic published a Sonnet 4.5 model card describing the model's intended use cases, evaluation results, and known limitations.",
      "source": "https://www.anthropic.com/news/claude-sonnet-4-5",
      "date": "2026-04-15",
      "confidence": "high"
    },
    {
      "text": "Reddit r/ClaudeAI consistently reports the Haiku-then-Sonnet hybrid pattern reduces production API spend 60-80% without measurable quality loss in routing-then-reasoning workflows.",
      "source": "https://reddit.com/r/ClaudeAI/comments/1sxj6s3/",
      "date": "2026-04-12",
      "confidence": "medium"
    }
  ],
  "updateLog": [
    {
      "version": "v1",
      "date": "2026-04-23T00:00:00.000Z",
      "notes": "Initial publish."
    }
  ]
}