Open-weight models take 56% of token volume, Astra doubles Fable 5.1 spend

Vercel
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In August 2026, open-weight AI models processed 56% of tokens on AI Gateway, surpassing closed-weight models for the first time. OpenAI's GPT-6 Astra quickly captured a significant share of spending, doubling Anthropic's Fable 5.1 spend. Token prices fell 23.2% in August, benefiting users with lower costs.

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