Grok 4.5, the new model xAI released on July 8, 2026, scored an Elo of 1328 on the web-development category (Website Arena) of Design Arena, a crowdsourced benchmark that evaluates AI models on real tasks, placing it 5th. That marks a roughly 25-rank jump over the company's previous best model, putting it in essentially the same performance band as Anthropic's Claude Opus 4.6 (Thinking).
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