Key takeaways
- Claude Fable 5 is Anthropic's 5th-generation model and first in its Mythos class.
- The model offers Mythos-level capabilities, with safeguards for broader use.
- Claude Fable 5 can work for days at a time in an agent harness like Claude Code.
- The model plans its approach, checks progress, and refines work as it goes.
On June 9, Amazon Web Services (AWS) announced the availability of Anthropic's Claude Fable 5 on Amazon Bedrock and Claude Platform on AWS. Claude Fable 5 brings Mythos-level capabilities to all customers, with strong safeguards designed to make it safe for broader use. The model is built for ambitious, long-running and complex work that previous models couldn't sustain.
What sets Claude Fable 5 apart
- Long-running execution—executes coding and knowledge work tasks for extended periods without intervention.
- Advanced vision—understands diagrams, charts, and tables nested in files and PDFs.
- Self-verification—updates its own skills based on learnings and develops its own harnesses and evaluations.
How to access Claude Fable 5
- Amazon Bedrock—build within your existing AWS environment and scale inference workloads. Access the model programmatically using the Anthropic Messages API, or use it in the Bedrock console Playground.
- Claude Platform on AWS—access through use Anthropic's native platform experience.
Visit Anthropic's Claude in Amazon Bedrock product page for more detailed information on all Claude models available on AWS.
Dive deeper
Visit Anthropic’s Claude in Amazon Bedrock product page for more detailed information on Claude Fable 5, Claude Opus 4.8, Claude Opus 4.7, Claude Sonnet 4.6, Claude Opus 4.6, Claude Haiku 4.5, Claude Sonnet 4.5, Claude Opus 4.1, and Claude Sonnet 4.
June 9, 2026: This article has been updated to reflect the availability of Claude Fable 5.
May 28, 2026: This article has been updated to reflect the availability of Claude Opus 4.8.
February 17, 2026: This article has been updated to reflect the availability of Claude Sonnet 4.6.
February 5, 2026: This article has been updated to reflect the availability of Claude Opus 4.6.
November 24, 2025: This article has been updated to reflect the availability of Claude Opus 4.5.
October 15, 2025: This article has been updated to reflect the availability of Claude Haiku 4.5.
September 29, 2025: This article has been updated to reflect the availability of Claude Sonnet 4.5.
August 5, 2025: This article has been updated to reflect the availability of Claude Opus 4.1.
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