AWS published a "What's New" entry for Claude Fable 5.1 in September 2026, confirming that Anthropic's new model is available on Amazon's cloud platform under the URL path /about-aws/whats-new/2026/09/claude-fable-5-1-aws/. The supplied scrape is dominated by AWS's cookie and preference banner text, so the excerpt itse For teams already running Claude workloads on Amazon Bedrock or other AWS services, the AWS listing is the clearest supplied signal that Fable 5.1 is available for deployment on AWS, complementing the API and Claude Platform availability reported by other sources. Any specifics about Bedrock region rollout, inference p

An AI/TLDR daily digest entry for September 1, 2026 reports that Claude Code 2.1.257 switches its default Fable model to Claude Fable 5.1 and tightens auto mode by no longer waving through container-escape moves. The same digest highlights Claude Fable 5.1 as Anthropic's new top-end model, noting that the $10 input and For developers, this is concrete evidence that Claude Fable 5.1 reached Anthropic's own Claude Code tooling on launch day, becoming the default Fable model in the 2.1.257 release, and that the same release added a security behavior change around container-escape handling in auto mode. The digest does not itself provide

According to a kie.ai analysis, Anthropic officially launched Claude Fable 5.1 on September 1, 2026 alongside Claude Mythos 5.1, with the models described as designed for coding and knowledge work. The launch is reported to make Fable 5.1 available through the API and Claude Platform, selectable in Claude Code, and rep The same piece reports headline usage-based pricing of $10 per million input tokens and $50 per million output tokens for Fable 5.1, with cache reads falling from Fable 5's $1 to $0.25 per million tokens, a 75% reduction. The launch specification cited includes a one-million-token context window. These pricing and benc