- Claude Fable 5 is now generally available on multiple platforms including the Claude API, Claude Platform on AWS, Amazon Bedrock, Vertex AI, and Microsoft Foundry as of June 9, 2026.
- The model is priced at $10 per million input tokens and $50 per million output tokens.
- An AI for coding benchmarks, Fable 5 is designed to handle asynchronous tasks running for extended durations within an agent harness, featuring a 1 million token context window.
- The autonomous development capabilities of Fable 5 require redesigning the pipeline to maximize its performance while maintaining provenance and managing refusal boundaries.
- Safety classifiers are included in Fable 5, allowing it to decline inappropriate requests.
Claude Fable 5 offers groundbreaking advancements in software engineering with capabilities specifically designed for extended asynchronous tasks. Debuting on June 9, 2026, it is available across major platforms, including AWS and Microsoft Foundry.1
The new model is positioned as state-of-the-art on coding benchmarks and has a unique ability to handle a 1 million token context window. Its primary feature is the ability to run tasks for longer durations, making it a pioneering tool in autonomous development.
As Anthropic strives to redesign software development pipelines, they acknowledge the importance of maintaining provenance while expanding the capabilities of this robust technology.
Moreover, Claude Fable 5 has integrated safety classifiers to decline requests when necessary, ensuring responsible use of the technology. It is priced at $10 per million input tokens and $50 per million output tokens, making it a competitive option for developers looking to enhance their projects.5
“Claude Fable 5 is now available, offering significant capabilities for software engineering. Priced at $10 per million input tokens, it includes features for asynchronous tasks and safety classifiers.”
The Futurum Group