Claude Fable 5: Anthropic's New AI Model is Here

Summary

Anthropic has officially launched Claude Fable 5, described as a "mythos class model" generally available and reportedly exceeding previous models on most AI capability benchmarks. Early testing shows remarkable performance, with benchmarks like Magenta code achieving 80%, a significant improvement over older models. While Fable 5 is available to everyone, Claude Mythos 5 is currently restricted to "glasswing partners." The pricing for both models is set at $10 per million input tokens and $50 per million output tokens. The company is rolling out Fable 5 access in stages, included in Pro Max and SE-based enterprise plans until June 23rd, after which usage credits will be required. Safeguards have been implemented, preventing Fable 5 from engaging in activities like penetration testing, and it will fall back to an older model for biology and chemistry requests to maintain safety. Users are encouraged to start building with the new model immediately, as it's expected to drive significant innovation.