Anthropic to charge usage fees for Claude Fable 5

Anthropic will require usage-based payments from subscribers seeking access to its leading consumer AI model. The move complicates the longstanding free-or-subscription model for AI chatbots. It signals the potential end of simple monthly AI plans.

AI model developers have long offered consumers a simple deal. Users could access the technology for free through an online chatbot or pay a monthly subscription for more usage, premium features, and advanced models.

Anthropic is about to alter that arrangement. Claude subscribers must soon pay usage-based fees to reach the company’s best consumer AI model, Claude Fable 5.

The shift marks a departure from the flat-fee approach that has defined much of the consumer AI market.

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Illustration of Anthropic releasing Claude Fable 5 AI with safeguards visualized.
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Anthropic releases Claude Fable 5 AI model publicly

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Anthropic launched Claude Fable 5 on Tuesday as its first publicly available Mythos-class model. The release includes safeguards that route sensitive queries on cybersecurity, biology and chemistry to an earlier model. Subscribers can access it through June 22 before usage credits apply.

Anthropic has paused upcoming changes to its billing practices for the Claude Agent SDK. The move reverses a shift that would have raised costs for heavy users starting this month.

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A subscriber has filed a proposed class action lawsuit against Anthropic, alleging the company misled customers about usage limits on its premium Claude Max subscription plans. The suit claims actual limits fall short of advertised amounts for the Max 5x and Max 20x tiers.

The Trump administration directed Anthropic to revoke access to its advanced AI models following concerns about ties to China. The move led the company to take its most powerful offerings offline last week.

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Anthropic raised $65 billion in a new funding round and reached a $900 billion valuation, surpassing OpenAI.

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