Physix Frontier · News Briefing Card (IT Home · Sep 2, 2026)

Anthropic Launches Claude 5.1, Cuts Cache Fees 75%

KEY FACTS

On September 1, Anthropic released the Fable and Mythos 5.1 models, with the latter restricted to vetted institutions.
Fable 5.1 significantly outperformed its predecessor and competitor GPT-5.6 in coding and scientific benchmarks.
Cache read fees were reduced by 75%, lowering costs for typical workloads by approximately 25% to 45%.
The company introduced Enterprise Frontier Safeguards (EFS), allowing customers to fully control data via their own cloud infrastructure.
To comply with the EU AI Act, new model outputs now include invisible watermarks by default to meet transparency requirements.

KEY DATA

75%Cache Read Reduction

55.8%Terminal-Bench 4.0 Score

$10/millionInput Token Price

PHYSIX OBSERVATION

Anthropic is shifting from a pure performance race to building an enterprise moat defined by high availability and strict compliance. The steep cut in cache costs directly addresses the pain points of agentic applications, while EFS and EU watermarking mechanisms precisely respond to major clients' anxieties regarding data sovereignty and regulation. By deeply intertwining technical iteration with geopolitical compliance, this strategy aims to accelerate dominance in the global enterprise market through lowered barriers and alleviated concerns.

Source: IT Home report