Anthropic’s best AI model struggles to attract users as cheaper tools thrive

Simon Willison's Weblog
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Anthropic's AI model revenue grew to $65bn in July 2026, with 6,000 customers spending over $100,000 annually. Despite this, cheaper models like OpenAI's GPT 5.6, launched in July, gained more user adoption. Ramp AI index data shows Anthropic's Opus 4.8 leads in usage, while the costlier Fable 5 model is less popular.

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