{
  "id": 10504515,
  "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",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-28T18:07:55.000Z",
  "source": {
    "name": "9to5Mac",
    "slug": "9to5mac",
    "url": "https://9to5mac.com/2026/09/28/anthropic-upgrades-claude-with-new-sonnet-5-5-model-details-here/"
  },
  "original_language": "en",
  "account": "Anthropic has unveiled an upgraded version of its Claude Sonnet model, with the new Sonnet 5.5 model replacing Sonnet 5 since June. The company's Claude AI suite currently includes three main models: Haiku, Sonnet, and Opus, with Fable/Mythos being the highest tier. The introduction of the new Sonnet 5.5 model follows the launch of Opus 5.5 last week. Anthropic announced that Sonnet 5.5 excels at everyday tasks with clear objectives, such as debugging code and crafting polished documents, slides, and spreadsheets. The company also emphasizes its design capabilities, including refining user interfaces and producing slides that closely adhere to templates, requiring minimal editing.\n\nTesters have noted that Sonnet 5.5 is a more effective collaborator than Sonnet 5, producing clearer writing and operating at a speed that is ideal for rapid iteration on less complex tasks. Notably, Sonnet 5.5 maintains the same pricing as its predecessor: $2 per million input tokens, $10 per million output tokens, and $0.20 per million cache reads. Furthermore, Anthropic claims that Sonnet 5.5 is faster, generating output more than 30% quicker than Sonnet 5, and is the fastest Sonnet model to date.\n\nWith cybersecurity capabilities on par with Opus 5, Sonnet 5.5 is the first Sonnet model to incorporate safeguards and fallbacks comparable to those used for Anthropic's most powerful models. Its biology safeguards remain unchanged from Sonnet 5, targeting a narrow set of high-risk requests while leaving routine software development and most life sciences work unaffected. For more details, you can read the full announcement post here.",
  "summary": "Anthropic is upgrading Claude Sonnet, replacing Sonnet 5 from June with Sonnet 5.5 as the best medium-sized model. more…",
  "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": "The New Stack",
        "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",
        "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": "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."
}