Radio versus X-ray luminosity of DES0141−54 (red point) compared to RL high-z quasars (blue triangles). Yellow circles indicate the confirmed blazars found in the literature, as in Fig. 5. The solid black line is the 1:1 relation, and the two dashed black lines are the 1σ and 2σ relations. DES0141−54 is one of the most powerful radio high-z AGNs ever discovered though it has a very weak X-ray luminosity (> 2σ out of the mean distribution).