Unconditional Image Generation on CelebA-HQ 256x256
3.53Fréchet Distance (FD)Ours
Evaluation results
| Method | Links | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| OursBackbone=DiT-L/2, Resolution=256 × 256, Space=Latent, NFE=80, Time (s)=1.51, Params=612M, GFLOPs=16.52026.02 | 3.53 | — | — | 0.53 | — | — | — | — | |
| LDMBackbone=U-Net, Resolution=256 × 256, Space=Latent, NFE=50, Time (s)=2.90, Params=150M, GFLOPs=10.22026.02 | 5.11 | — | — | 0.49 | — | — | — | — | |
| LFMBackbone=DiT-L/2, Resolution=256 × 256, Space=Latent, NFE=89, Time (s)=1.70, Params=541M, GFLOPs=22.12026.02 | 5.26 | — | — | 0.46 | — | — | — | — | |
| RDMMethod Family=Diffusion / score-based family, Hardware=single H100, batched2026.05 | 5.77 | — | 70.9 | 49.5 | — | — | 3.29 | 1,713 | |
| FMBackbone=U-Net, Resolution=256 × 256, Space=Image, NFE=1282026.02 | 7.34 | — | — | — | — | — | — | — | |
| EdifyImageBackbone=DiT-L/2, Resolution=256 × 256, Space=Image, NFE=95, Time (s)=2.10, Params=602M, GFLOPs=28.92026.02 | 7.62 | — | — | 0.47 | — | — | — | — | |
| StyleSwinMethod Family=GAN family, Hardware=single H100, batched2026.05 | 7.99 | — | 62.6 | 36.2 | — | — | 3.46 | 39.6 | |
| RS-IMLE + RTM (Ours)Method Family=IMLE family, Hardware=single H100, batched, H=16, L=22026.05 | 10.67 | — | 95.2 | 59.2 | — | — | 3.36 | 19.6 | |
| Pyramidal FlowBackbone=DiT-L/2, Resolution=256 × 256, Space=Latent, NFE=90, Time (s)=1.85, Params=544M, GFLOPs=14.22026.02 | 11.2 | — | — | 0.48 | — | — | — | — | |
| LSGMMethod Family=VAE / score-based family, Hardware=single H100, batched2026.05 | 11.69 | — | 76.1 | 33.7 | — | — | 2.61 | 1,070 | |
| RS-IMLE BaselineMethod Family=IMLE family, Hardware=single H100, batched2026.05 | 15.43 | — | 92.4 | 49.1 | — | — | 3.18 | 18.1 | |
| DDGANMethod Family=Diffusion / score-based family, Hardware=single H100, batched2026.05 | 15.83 | — | 68.3 | 20.5 | — | — | 2.71 | 8.8 | |
| ProxDM (hybrid)Method Family=Diffusion / score-based family, Hardware=single H100, batched2026.05 | 19.94 | — | 63.4 | 21.7 | — | — | 2.76 | 365 | |
| VAEBMMethod Family=VAE / score-based family, Hardware=single H100, batched, Checkpoint Source=Released checkpoint2026.05 | 20.38 | — | — | — | — | — | — | — | |
| NVAEMethod Family=VAE / score-based family, Hardware=single H100, batched, Checkpoint Source=Released checkpoint2026.05 | 29.76 | — | — | — | — | — | — | — | |
| DDPMMethod Family=Diffusion / score-based family, Hardware=single H100, batched2026.05 | 33.49 | — | 44.7 | 14.7 | — | — | 2.44 | 577 | |
| Rex (Euler-Maruyama)Steps=50, Solver Type=Reversible SDE2025.02 | 391.93 | 381.01 | 87 | 28 | 98 | 56 | — | — | |
| Rex (Euler-Maruyama)Steps=20, Solver Type=Reversible SDE2025.02 | 460.42 | 447.01 | 86 | 21 | 91 | 51 | — | — | |
| O-BELMSteps=502025.02 | 476.29 | 463.07 | 84 | 29 | 77 | 45 | — | — | |
| O-BELMSteps=202025.02 | 489.94 | 477.82 | 82 | 23 | 71 | 43 | — | — | |
| DDIMSteps=502025.02 | 490.88 | 479.87 | 80 | 26 | 67 | 45 | — | — | |
| BDIASteps=502025.02 | 500.79 | 489.24 | 82 | 27 | 70 | 44 | — | — | |
| Rex (Midpoint)Steps=50, Solver Type=Reversible ODE2025.02 | 505.67 | 494.94 | 81 | 29 | 70 | 44 | — | — | |
| Rex (RK4)Steps=50, Solver Type=Reversible ODE2025.02 | 511.17 | 498.94 | 80 | 27 | 69 | 44 | — | — | |
| Rex (Midpoint)Steps=20, Solver Type=Reversible ODE2025.02 | 539.96 | 527.85 | 81 | 26 | 66 | 41 | — | — | |
| Rex (RK4)Steps=20, Solver Type=Reversible ODE2025.02 | 547.24 | 533.3 | 82 | 27 | 71 | 43 | — | — | |
| EDICTSteps=502025.02 | 551.13 | 534.73 | 78 | 24 | 60 | 37 | — | — | |
| DDIMSteps=202025.02 | 570.11 | 555.26 | 79 | 20 | 62 | 38 | — | — | |
| O-BELMSteps=102025.02 | 605.52 | 596.47 | 78 | 18 | 56 | 34 | — | — | |
| Rex (Midpoint)Steps=10, Solver Type=Reversible ODE2025.02 | 607.2 | 597.04 | 78 | 21 | 60 | 37 | — | — | |
| Rex (Euler-Maruyama)Steps=10, Solver Type=Reversible SDE2025.02 | 610.16 | 598.56 | 79 | 10 | 61 | 37 | — | — | |
| BDIASteps=202025.02 | 611.47 | 601.37 | 76 | 19 | 50 | 30 | — | — | |
| Rex (RK4)Steps=10, Solver Type=Reversible ODE2025.02 | 633.9 | 617.11 | 81 | 22 | 64 | 36 | — | — | |
| DDIMSteps=102025.02 | 727.75 | 716.41 | 75 | 14 | 49 | 27 | — | — | |
| EDICTSteps=202025.02 | 752.68 | 743.89 | 68 | 15 | 36 | 21 | — | — | |
| BDIASteps=102025.02 | 900.95 | 894.23 | 61 | 10 | 28 | 14 | — | — | |
| EDICTSteps=102025.02 | 1,042.89 | 1,034.82 | 49 | 10 | 19 | 11 | — | — |