China-based artificial intelligence company SenseTime has raised a US$620 million Series C+ round valuing the company at more than US$4.5 billion. Investment firms Fidelity International, Hopu Investment Management, Silver Lake and Tiger Global Management led the round, which also included participation from Qualcomm Ventures and other financial and strategic investors. SenseTime plans to use the new capital to invest in research and development and in its talent pool.