{
  "id": 10505835,
  "title": "Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price",
  "url": "https://urgent.news/2026/09/28/anthropic-launches-claude-sonnet-5-5-with-near-opus-performance-at",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-28T18:00:00.000Z",
  "source": {
    "name": "The New Stack",
    "slug": "the-new-stack",
    "url": "https://thenewstack.io/claude-sonnet-55-launch/"
  },
  "original_language": "en",
  "account": "Anthropic released Claude Sonnet 5.5 on Monday, the second model in the 5.5 family after Opus 5.5. The new Sonnet model offers a 30% speed increase over its predecessor, Sonnet 5, while cutting costs by up to 30%. Anthropic positions it as a faster, more affordable alternative to Claude Opus 5.5, excelling at well-defined daily tasks like debugging and crafting polished documents, slides, and spreadsheets. Early users also noted it improves user interfaces and can generate decks using slide templates with minimal editing. Like Opus 5.5, Sonnet 5.5 boasts clearer, more natural-sounding text. In benchmark tests, it outperforms Sonnet 5 by significant margins, particularly in coding tasks, matching Opus 5.5's performance in most areas. It scores 52.1% on Cognition's FrontierCode, close to Opus 5.5's 54.4%, and 1,844 on Artificial Analysis' GDPval-AA when compared to GPT-6 Sol's 1,487. While it competes with Opus 5.5 in efficiency and reasoning, Anthropic acknowledges Opus 5.5 still leads in complex, open-ended tasks that require extensive judgment. Pricing remains the same as Opus 5.5, at $2 per million input tokens and $10 per million output tokens, with cache reads priced at $0.20 per million tokens. Sonnet 5.5 is now accessible on Claude Platform, AWS, Google Cloud, and Azure, with developers needing to update settings for those using thinking mode.",
  "summary": "Anthropic on Monday launched Claude Sonnet 5.5, the latest version of its workhorse model and the second model in the The post Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price appeared first on The New Stack .",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 6,
    "also_reported_by": [
      {
        "outlet": "TechCrunch",
        "title": "Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner",
        "url": "https://urgent.news/2026/09/28/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper",
        "published": "2026-09-28T18:00:00.000Z"
      },
      {
        "outlet": "SiliconANGLE",
        "title": "Anthropic debuts Claude Sonnet 5.5 running 30% faster than the previous-generation AI model",
        "url": "https://urgent.news/2026/09/28/anthropic-debuts-claude-sonnet-5-5-running-30-faster-than-the",
        "published": "2026-09-28T18:00:39.000Z"
      },
      {
        "outlet": "Techmeme",
        "title": "Anthropic releases Sonnet 5.5, saying it generates outputs 30%+ faster than Sonnet 5 and costs up to 30% less per task, and plans to release Haiku 5.5 soon (Anthropic)",
        "url": "https://urgent.news/2026/09/28/anthropic-releases-sonnet-5-5-saying-it-generates-outputs-30-faster",
        "published": "2026-09-28T18:07:28.000Z"
      },
      {
        "outlet": "9to5Mac",
        "title": "Anthropic upgrades Claude with new Sonnet 5.5 model, details here",
        "url": "https://urgent.news/2026/09/28/anthropic-upgrades-claude-with-new-sonnet-5-5-model-details-here",
        "published": "2026-09-28T18:07:55.000Z"
      },
      {
        "outlet": "Seeking Alpha News",
        "title": "Anthropic unveils new, low-cost Claude Sonnet 5.5 model",
        "url": "https://urgent.news/2026/09/28/anthropic-unveils-new-low-cost-claude-sonnet-5-5-model",
        "published": "2026-09-28T18:54:31.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}