xAI 發佈 Grok4Fast，效率提升40%，基準測試表現不輸 Grok4!
xAI 推出了 Grok4Fast，這是一款輕量級的旗艦模型，據該公司稱，其性能可媲美 Grok4，但計算量減少了40%。據AIbase報道，這一顯著的效率提升使得每項任務的成本最多可降低98%。性能與效率的平衡Grok4Fast 在多個基準測試中表現出色，例如在 GPQA Diamond 中得分高達85.7%，在 AIME2025 中得分爲92.0%，這些成績與 Grok4甚至 GPT-5等頂尖模型不相上下。xAI 強調，該模型通過減少“思考標記”實現了這一成就，平均使用比 Grok4少40% 的標記就能獲得相似的結果。在處理需要複雜推理的問題時，這種效率優勢尤
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