| Final 20:05 | | time | | gap | Butter | Back | Breast | pts | L | ag | | 1. Lewis Clareburt |  New Zealand | 4:09.72 | | | 56.48s5 | 2:00.663 | 3:12.012 | 915 | 2 | 24 | | 2. Max Litchfield |  Great Britain | 4:10.40 | | +0.68s | 56.55s6 | 2:00.092 | 3:12.303 | 908 | 5 | 28 | | 3. Daiya Seto |  Japan | 4:12.51 | | +2.79s | 56.47s4 | 2:01.554 | 3:12.684 | 885 | 3 | 29 | | 4. Carson Foster |  United States | 4:12.62 | | +2.90s | 55.18s1 | 1:58.431 | 3:11.361 | 884 | 6 | 22 | | 5. David Johnston | United States | 4:13.05 | | +3.33s | 57.07s7 | 2:03.377 | 3:14.695 | 880 | 4 | 22 | | 5. Alberto Razzetti |  Italy | 4:13.05 | | +3.33s | 56.14s3 | 2:03.908 | 3:15.396 | 880 | 8 | 24 | | 7. Lorne Wigginton |  Canada | 4:14.98 | | +5.26s | 57.38s8 | 2:03.265 | 3:15.937 | 860 | 1 | 18 | | 8. Balazs Hollo |  Hungary | 4:19.66 | | +9.94s | 56.12s2 | 2:03.296 | 3:17.728 | 814 | 7 | 25 |
| World and Championship Record: Leon, Marchand, France 4:02.50 Fukuoka, Japan 23rd July 2023 | | Olympic Qualification Time (14th Tokyo 2020): 4:12.50 Olympic Consideration Time (+5% OQT): 4:13.76 |
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Heats - Sunday, 18th February 09:32 | | Best 8 times advanced to Final. No OQT. OCT - First 5. |
| Heat 3 09:45 | | time | | gap | Butter | Back | Breast | pts | L | ag | | 4. Carson Foster | United States | 4:13.24 | Q | +0.73s | 56.13s | 2:00.21 | 3:12.50 | 878 | 4 | 22 | | 5. Lewis Clareburt | New Zealand | 4:13.61 | Q | +1.10s | 56.91s | 2:01.82 | 3:14.10 | 874 | 3 | 24 | | 6. Balazs Hollo | Hungary | 4:13.93 | Q | +1.42s | 56.40s | 2:03.59 | 3:15.17 | 870 | 6 | 25 | | 8. Alberto Razzetti | Italy | 4:15.84 | Q | +3.33s | 56.84s | 2:04.94 | 3:16.82 | 851 | 5 | 24 | | 9. Robert-Andrei Badea |  Romania | 4:18.43 | | +5.92s | 58.54s | 2:04.61 | 3:19.33 | 826 | 9 | 16 | | 10.Collyn Gagne | Canada | 4:18.74 | | +6.23s | 57.35s | 2:04.32 | 3:18.33 | 823 | 1 | 23 | | 12.Zhanshuo Zhang |  China | 4:19.86 | | +7.35s | 58.97s | 2:06.01 | 3:21.12 | 812 | 7 | 16 | | 13.Richard Nagy |  Slovakia | 4:20.76 | | +8.25s | 58.30s | 2:06.02 | 3:21.36 | 804 | 8 | 30 | | 17.Matthew Sates |  South Africa | 4:25.04 | | +12.53s | 57.36s | 2:07.79 | 3:23.99 | 765 | 2 | 20 | | 21.Hsing-Hao Wang |  Chinese Taipei | 4:39.53 | | +27.02s | 59.37s | 2:09.26 | 3:30.46 | 652 | 0 | 24 |
| Heat 2 09:39 | | time | | gap | Butter | Back | Breast | pts | L | ag | | 1. David Johnston | United States | 4:12.51 | Q | | 57.40s | 2:03.68 | 3:14.69 | 885 | 1 | 22 | | 2. Max Litchfield | Great Britain | 4:12.54 | Q | +0.03s | 56.94s | 2:01.63 | 3:13.88 | 885 | 3 | 28 | | 3. Daiya Seto | Japan | 4:13.06 | Q | +0.55s | 56.19s | 2:01.16 | 3:12.83 | 879 | 4 | 29 | | 7. Lorne Wigginton | Canada | 4:14.54 | Q | +2.03s | 56.63s | 2:02.91 | 3:15.15 | 864 | 6 | 18 | | 11.Marius Toscan |  Switzerland | 4:19.24 | | +6.73s | 58.34s | 2:05.86 | 3:19.61 | 818 | 0 | 22 | | 14.Minseop Kim |  South Korea | 4:20.93 | | +8.42s | 56.46s | 2:02.22 | 3:19.61 | 802 | 8 | 19 | | 20.Quang Thuan Nguyen |  Vietnam | 4:28.72 | | +16.21s | 59.57s | 2:10.53 | 3:26.50 | 734 | 9 | 18 | | -. Thomas Jansen |  Netherlands | 4:15.12 | DQ | | 56.54s | 2:02.01 | 3:14.20 | | 7 | 22 | | -. Apostolos Papastamos |  Greece | 4:15.36 | DQ | | 58.17s | 2:03.06 | 3:15.03 | | 2 | 22 | | -. Tomoru Honda | Japan | DNS | | | - | | | | 5 | 22 |
| Heat 1 09:33 | | time | | gap | Butter | Back | Breast | pts | L | ag | | 15.Fers Erzen Anze |  Slovenia | 4:23.64 | | +11.13s | 59.22s | 2:06.89 | 3:21.97 | 778 | 6 | 24 | | 16.Jaouad Syoud |  Algeria | 4:23.66 | | +11.15s | 59.10s | 2:08.20 | 3:21.10 | 778 | 5 | 24 | | 18.Khai Xin Tan |  Malaysia | 4:25.16 | | +12.65s | 1:00.72 | 2:11.19 | 3:26.12 | 764 | 3 | 19 | | 19.Erick Gordillo |  Guatemala | 4:25.34 | | +12.83s | 58.87s | 2:05.99 | 3:23.57 | 763 | 4 | 24 | | 22.Oliver Durand |  Namibia | 4:42.64 | | +30.13s | 1:00.10 | 2:13.11 | 3:35.63 | 631 | 7 | 16 | | 23.Ahmed Theibich |  Bahrain | 4:54.79 | | +42.28s | 1:04.47 | 2:24.61 | 3:46.42 | 556 | 1 | 16 | | -. Jarod Arroyo |  Puerto Rico | 4:28.23 | DQ | | 59.90s | 2:09.35 | 3:24.66 | | 2 | 23 |
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