{
  "id": 5304915,
  "title": "What you should know about Claude Mythos 5.1",
  "url": "https://urgent.news/2026/09/03/what-you-should-know-about-claude-mythos-5-1",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-03T10:31:38.000Z",
  "source": {
    "name": "TechCabal",
    "slug": "techcabal",
    "url": "https://techcabal.com/2026/09/03/claude-mythos-5-1-price-and-availability-explained/"
  },
  "original_language": "en",
  "account": "Claude Mythos 5.1 is Anthropic's latest AI model specifically designed for vetted cybersecurity and life science organizations. Released on September 1, 2026, it replaces Claude Mythos 5 and offers similar general capabilities to Claude Fable 5.1. However, access to Mythos 5.1 requires special approval through Anthropic's trusted programmes, and it is currently limited to selected organizations in the United States.\n\nPricing for Claude Mythos 5.1 is $10 per million input tokens and $50 per million output tokens. It features a one-million-token context window and can return up to 128,000 tokens in a single response. Unlike other Anthropic models, access to Mythos 5.1 is not included in standard subscriptions.\n\nKey features of Claude Mythos 5.1 include advanced cybersecurity research, life science research support, long-running autonomous work, coding across large repositories, research and document creation, and adjustable reasoning effort. The model accepts text and images and returns text, capable of analyzing source code, research files, screenshots, tables, and document pages. It can continue research across long sequences, update on progress, and recover from issues without restarting. It can also handle large code repositories, write tests, review changes, and create reports, spreadsheets, documents, and presentations combining text and visual information. The reasoning effort level can be adjusted, with higher effort using more tokens and increasing latency.",
  "summary": "Claude Mythos 5.1 costs $10 per million input tokens and $50 per million output tokens. It has a one-million-token context window and can return up to 128,000 tokens in one response.",
  "key_points": [
    "Released September 1, 2026, as Claude Mythos 5.1 replacement",
    "Requires special approval for access, limited to US organizations",
    "Priced at $10 per million input, $50 per million output tokens"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "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."
}