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Tuesday, September 1, 2026 · UTC
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Anthropic launches Claude Fable 5.1 on AWS for enterprise work

Anthropic makes Claude Fable 5.1 generally available on AWS for long-running knowledge tasks.

TruthFoundry News Desk
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Anthropic has made Claude Fable 5.1 generally available on Amazon Web Services (AWS) for all customers. [1] Anthropic announced the availability of Claude Fable 5.1 on Amazon Bedrock and the Claude Platform on AWS today. [2] Anthropic released Fable 5.1 and Mythos 5.1, twin versions of its most advanced AI model. [3] Anthropic, an AI safety-focused research firm valued at $965 billion as of its latest funding round in May 2026, has announced the launch of Enterprise Frontier Safeguards (EFS). [4] Anthropic announced the launch of Enterprise Frontier Safeguards (EFS), a solution that combines zero data retention (ZDR) with safeguards for detecting misuse, storing data in customer-controlled cloud infrastructure. [5] Anthropic has designated Claude Fable 5.1 as a Covered Model, which carries additional data retention, safety review, and access policies. [6] Anthropic reports that Claude Fable 5.1 is a clear improvement over Fable 5 on the hardest reasoning tests, including competition mathematics and graduate-level questions in engineering and the sciences. [7] Because Claude Fable 5.1 is a Covered Model, its use is subject to data retention for up to 30 days and human review by Amazon personnel. [8] Fable 5.1, the unrestricted version, is available on cloud platforms or through the Anthropic API. [9] Mythos 5.1 will only be available to registered Anthropic partners engaged in cybersecurity or life sciences research. [10] The Fable 5.1 release includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards. [11] In the EFS implementation, customer data is stored in cloud infrastructure managed entirely by the enterprise rather than Anthropic. [12]
What this stands on
  1. Anthropic has made Claude Fable 5.1 generally available on Amazon Web Services (AWS) for all customers. · Amazon Web Services, Inc.
  2. Anthropic announced the availability of Claude Fable 5.1 on Amazon Bedrock and the Claude Platform on AWS today. · Amazon Web Services
  3. Anthropic released Fable 5.1 and Mythos 5.1, twin versions of its most advanced AI model. · TechCrunch
  4. Anthropic, an AI safety-focused research firm valued at $965 billion as of its latest funding round in May 2026, has announced the launch of Enterprise Frontier Safeguards (EFS). · Blockchain.News
  5. Anthropic announced the launch of Enterprise Frontier Safeguards (EFS), a solution that combines zero data retention (ZDR) with safeguards for detecting misuse, storing data in customer-controlled cloud infrastructure. · anthropic.com
  6. Anthropic has designated Claude Fable 5.1 as a Covered Model, which carries additional data retention, safety review, and access policies. · Amazon Web Services, Inc.
  7. Anthropic reports that Claude Fable 5.1 is a clear improvement over Fable 5 on the hardest reasoning tests, including competition mathematics and graduate-level questions in engineering and the sciences. · Amazon Web Services
  8. Because Claude Fable 5.1 is a Covered Model, its use is subject to data retention for up to 30 days and human review by Amazon personnel. · Amazon Web Services
  9. Fable 5.1, the unrestricted version, is available on cloud platforms or through the Anthropic API. · TechCrunch
  10. Mythos 5.1 will only be available to registered Anthropic partners engaged in cybersecurity or life sciences research. · TechCrunch
  11. The Fable 5.1 release includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards. · TechCrunch
  12. In the EFS implementation, customer data is stored in cloud infrastructure managed entirely by the enterprise rather than Anthropic. · Blockchain.News
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