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The General Electric GEnx ("General Electric Next-generation") is an advanced dual rotor, axial flow, high-bypass turbofan jet engine in production by GE Aerospace. It is one of two engine options available for the Boeing 787 Dreamliner, and it was also produced for the Boeing 747-8. The GEnx succeeds the CF6 in GE's product line.
| Designation | EASA certification | Continuous | Take-off rating |
| GEnx-1B | 29 March 2011 | ||
| GEnx-1B/P1 | 3 July 2012 | ||
| GEnx-1B/P2 | 24 June 2013 | ||
| GEnx-1B54/P2 | lbf) | lbf) | |
| GEnx-1B58/P2 | lbf) | ||
| GEnx-1B64/P2 | lbf) | lbf) | |
| GEnx-1B67/P2 | 17 May 2018 | lbf) | |
| GEnx-1B70/P2 | lbf) | lbf) | |
| GEnx-1B70/72/P2 | |||
| GEnx-1B70/75/P2 | |||
| GEnx-1B74/75/P2 | lbf) | lbf) | |
| GEnx-1B76/P2 | lbf) | ||
| GEnx-1B76A/P2 | |||
| GEnx-1B78/P2 | lbf) | ||
| GEnx-1B75/P2 | lbf) | lbf) | |
| GEnx-2B67 | 29 March 2011 | lbf) | lbf) |
| GEnx-2B67B | 21 October 2011 | ||
| GEnx-2B67/P | 24 January 2014 |
| Variant | -1B70 | -1B74/75 | -1B76/78 | -2B67B |
| Application | Boeing 787-8 | 787-9 | 787-10 | 747-8 |
| Fan diameter | 111.1 in (282 cm) | 104.7 in (266 cm) | ||
| Compressor | 1 fan, 4 LP, 10 HP | 1 fan, 3 LP, 10 HP | ||
| Turbine | 2 HP, 7 LP | 2 HP, 6 LP | ||
| Takeoff thrust | 69,800 lbf (310 kN) | 74,100 lbf (330 kN) | 76,100 lbf (339 kN) | 66,500 lbf (296 kN) |
| Takeoff bypass ratio | 9.3 | 9.1 | 9.1 | 8.0 |
| Takeoff OPR | 43.8 | 46.3 | 47.4 | 44.7 |
| Top-of-climb OPR | 53.3 | 55.4 | 58.1 | 52.4 |
| Takeoff air per second | 2,559 lb (1,161 kg) | 2,624 lb (1,190 kg) | 2,658 lb (1,206 kg) | 2,297 lb (1,042 kg) |
| Flange to flange | 184.7 in (469 cm) | 169.7 in (431 cm) | ||
| Nominal RPM | LP 2,560, HP 11,377 | LP 2,835, HP 11,377 | ||
| Dry weight | 13,552 lb (6,147 kg) | 12,397 lb (5,623 kg) | ||
| Thrust/weight | 5.15 | 5.47 | 5.62 | 5.36 |