iFlytek’s 2025 annual report, published on 29 April 2026, states that the company released the deep-reasoning model Spark X1 (星火 X1) in January 2025 and an upgraded deep-reasoning large model, Spark X1.5, in November 2025.
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iFlytek / 科大讯飞 → published → 科大讯飞股份有限公司2025年年度报告
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