Claude Fable 5

GPT-5.6 Sol (max) Tops CritPt, a New Benchmark of Unpublished Physics Research Problems

GPT-5.6 Sol (max) leads CritPt, a new physics benchmark built from unpublished graduate-level research problems, scoring about 5 points above GPT-5.5 and 4 points ahead of Claude Fable 5, according to independent testing by Artificial Analysis.

2026-07-13

Frontier AI Deployment

Claude Fable 5 and Mythos 5: The Future of AI Is Gated Intelligence

Anthropic's Claude Fable 5 brings Mythos-class capability to public users, while Mythos 5 remains trusted-access only. The deployment model, capability routing, fallback classifiers, and tiered access, represents a fundamental shift in how frontier AI is released and used.

2026-07-10

AI Regulation

Claude Fable 5 is back after the US lifted export controls. Here's what Anthropic changed

Anthropic redeploys Claude Fable 5 and Mythos 5 after US export controls are lifted. The company outlines safeguard updates, a proposed jailbreak severity framework, and new commitments to government collaboration on AI security.

2026-07-07

Export Controls

Anthropic Restores Access to Claude Fable 5 After US Export Controls Lifted

Anthropic restored Claude Fable 5 access globally after US export controls were lifted on June 30. The company introduced a new safety classifier to block a reported jailbreak and proposed a consensus framework for rating AI jailbreak severity with partners including Amazon, Microsoft, and Google.

2026-07-01

AI Models

Anthropic Launches Claude Fable 5: A Fifth-Generation Model for Extended Autonomous Work

Anthropic introduces Claude Fable 5, a fifth-generation model that can run agents for days, tackle ambitious coding projects, and handle complex enterprise workflows with minimal oversight. Pricing starts at $10 per million input tokens.

2026-07-01