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Claude Fable

Model ● Covered in 9 stories Compare ⇄ + Follow

Claude Fable is an AI model released by Anthropic in July 2026 that performs better than its predecessor Opus 4.8 on several benchmarks and is priced at twice the cost of Opus. The model was subject to U.S. export controls following a discovered jailbreak vulnerability, leading to worldwide availability restrictions that were later lifted after Anthropic implemented more restrictive safety classifiers. Following its restoration, Fable has faced competition from other frontier models like OpenAI's GPT-5.6 Sol, which demonstrated superior performance on reasoning and coding tasks.

Updated 3 August 2026

Specifications

No specifications recorded yet.

Latest developments

Experts say exploiting Anthropic’s Fable isn’t how Kimi K3 got so good TechCrunch AI · 1 week ago · 3 China’s Low-Priced Z.ai Model Is Exposing Costly Coder Habits IEEE Spectrum AI · 1 week ago · 10 AI #177 Part 1: Tip of the Iceberg Zvi (Don't Worry About the Vase) · 2 weeks ago · 31 OpenAI's big launch — and bigger departure Platformer · 3 weeks ago · 20 Fable #6: The Return of the King Zvi (Don't Worry About the Vase) · 1 month ago · 31 Why the tech industry can't keep up with the AI backlash Platformer · 1 month ago · 44
🔮 Exponential View #578: Fable & time to pause AI; iPhone vs babies; gene therapy, bad CEOs & Chinese Gen Z++ Exponential View · 1 month ago · 8 New Claude model - Fable Ben's Bites · 1 month ago · 35

Timeline

Month Quarter Year

2026

Moonshot AI releases Kimi K3, a 2.8 trillion parameter open-weight model with API pricing and delayed weights availability Model release

Moonshot AI releases Kimi K3, a 2.8 trillion-parameter open-weight model competing with frontier American systems Model release

OpenAI releases GPT-5.6 in multiple variants alongside frontier AI model releases from competitors Model release

US Commerce Department restricts Anthropic's Claude Fable model amid broader AI regulatory debate Policy change

Anthropic redeployed Fable 5 AI model with enhanced safety restrictions following government export controls Feature update

US government restricts Anthropic's Fable and Mythos models to US users only following jailbreak vulnerability Security issue

Anthropic releases Claude Fable 5 model with improved benchmarks and new safety restrictions Model release

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