{"version":1,"type":"story","url":"https://digestai.news/story/anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1","json":"https://digestai.news/story/anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1.json","markdown":"https://digestai.news/story/anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1.md","slug":"anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1","headline":"Anthropic cuts cache-reading fees by 75% in Claude Fable 5.1","summary":"Anthropic announced on September 1, 2026, that its top-tier model, **Claude Fable 5.1**, will be up to 45% cheaper for certain use cases, though the base price remains unchanged. The cost reduction stems from a 75% drop in the **cache-reading fee**, which applies when the model re-reads previously processed input—such as rereading a PDF or intermediate steps in an agent task. Anthropic compared this to bookmarking a page in a long document, reducing redundant processing costs.\n\nThe savings vary by usage: general tasks see about a **25% discount**, while delegated tasks (e.g., AI agents handling long workflows) can save up to **45%**, based on August 2026 data. Additionally, the model’s safety filters now block **basic biology and medical questions 85% less frequently** than in Fable 5, though complex or sensitive queries may still trigger Claude Opus 5 for handling. Anthropic’s CTO, Ogiso, emphasized that **Claude Opus 5.5**—released September 22—offers comparable capabilities at under half the price of Fable 5.1, suggesting users weigh cost against performance for their needs.","keyPoints":["Cache-reading fees dropped 75%, cutting costs for repeated input processing in Claude Fable 5.1","General use sees ~25% savings; delegated tasks (agents) save up to 45% based on August 2026 data","Safety filters now block biology/medical queries 85% less often than in Fable 5"],"whyItMatters":"The fee cut targets high-cost AI workflows like agents, making long-term automation more affordable for businesses. The relaxed safety filters could expand use cases but may introduce risks for sensitive queries.","category":{"slug":"models","name":"Generative AI & Models","url":"https://digestai.news/category/models"},"entities":{"companies":["Anthropic"],"models":["Claude Fable 5.1","Claude Fable 5","Claude Opus 5","Claude Opus 5.5"],"people":["Ogiso"]},"firstPublishedAt":"2026-10-05T20:02:00Z","updatedAt":"2026-10-05T20:02:00Z","sourceCount":1,"hasPrimarySource":false,"sources":[{"outlet":"note.com","title":"What is the cost of Claude Fable 5.1? Up to 45% cheaper with no price cuts [EeeeAI]","url":"https://note.com/eeeemo_japan/n/n5739ceff9f9b?hl=en","publishedAt":"2026-10-05T20:02:00Z","type":"press","primary":false,"lead":true}],"sourceNotes":null,"discussions":[],"thread":{"title":"Claude Outage and Reset Token Saga","url":"https://digestai.news/thread/anthropic-s-claude-reportedly-down-for-thousands-of-users-on-september-21","storyCount":3},"cite":{"text":"Digest AI, \"Anthropic cuts cache-reading fees by 75% in Claude Fable 5.1\", 5 October 2026, https://digestai.news/story/anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1","publisher":"Digest AI","title":"Anthropic cuts cache-reading fees by 75% in Claude Fable 5.1","datePublished":"2026-10-05T20:02:00Z","url":"https://digestai.news/story/anthropic-cuts-cache-reading-fees-by-75-in-claude-fable-5-1"},"generatedBy":"Written by Digest AI's editorial model from the linked sources; the sources are the record.","license":"Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse"}