Who is the leader in AI chips?

Can you elaborate on who currently holds the position of being the leader in AI chips? Is it a particular company that has been at the forefront of innovation and development in this field, or is it a collective effort from multiple players? What factors have contributed to their rise to prominence, and what challenges do they face in maintaining their lead? Additionally, are there any emerging players or technologies that could potentially challenge the current leader's position in the NEAR future?