Techniques and examples of flexible signaling of capability of use equipment (UE) processing time in wireless communications are described. Accordingly, a UE establishes wireless communication with a network node of a wireless network. The UE also determines whether the UE is capable of operating in a second mode in addition to a first mode. The UE then transmits to the network node a report indicating capability of the UE to operate in the second mode and a condition with respect to a throughput associated with operating in the second mode. The UE performs a task in less time in the second mode than in the first mode.