# Legacy NeurIPS 2025 checkpoints -- diffusion_2d_cond Checkpoints from **EngiBench: A Framework for Data-Driven Engineering Design Research** (NeurIPS 2025 Datasets & Benchmarks, arXiv:2508.00831), migrated off Weights & Biases. > **These are NOT comparable to current EngiOpt checkpoints.** > The EngiBench problem definitions have changed since the paper, so a result > here and a result in `IDEALLab/engiopt-diffusion-2d-cond` for the same > problem id measure different things. They are kept under a separate repo > prefix for exactly this reason. Use these only to reproduce the paper. Layout: `{problem_id}/{wandb_collection}/{version}/`. See `legacy_index.json` for provenance (W&B run id, aliases, seed, timestamps).