Claude Fable 5.1 & GPT-6 Astra packages are live

performance

Frontend

Frontend performance — Core Web Vitals, bundle discipline, image and font strategy, rendering cost, and measuring on the devices users actually have.

Choose your model

Available for 11 model families. The engineering substance is the same in each; the structure, checklist phrasing and constraint ordering are tuned per family.

Claude

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Deepseek

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Gemini

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Glm

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Grok

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Kimi

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Minimax

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Mistral

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Open Ai

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Qwen

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Sarvam Ai

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