| --- |
| tags: |
| - molmoact2 |
| - robotics |
| - lerobot |
| - vla |
| datasets: |
| - armnet/busybox_multitask |
| base_model: allenai/MolmoAct2 |
| --- |
| |
| # molmoact2_busybox_multitask |
|
|
| Full-component fine-tune of [MolmoAct2](https://huggingface.co/allenai/MolmoAct2) on SO-101 BusyBox multitask. Token embeddings stay frozen. This card is the 4× H200 retrain at effective batch 32. |
|
|
| | | | |
| |---|---| |
| | **Init** | `allenai/MolmoAct2` (not the SO100_101 checkpoint) | |
| | **Dataset** | [armnet/busybox_multitask](https://huggingface.co/datasets/armnet/busybox_multitask) (132 episodes / 25,734 frames, 27 tasks) | |
| | **Cameras** | `top`, `wrist`, `front` | |
| | **Training** | 4× H200, effective batch 32 (8/GPU), 20k steps, horizon 30, gradient checkpointing off, bf16 | |
| | **Result** | loss 0.220 → 0.005. 14 h 23 m. Finished 2026-10-27 12:00 UTC. 5.046B learnable / 5.442B total | |
| | **W&B** | [dhseedj1](https://wandb.ai/pravsels/molmoact2_busybox_multitask/runs/dhseedj1) | |
| |
| ## Checkpoints |
| |
| `checkpoint-20000/` is the final step. Tags `step-5000`, `step-10000`, `step-15000`, and `step-20000` point at this run. |
| |
| ```python |
| from huggingface_hub import snapshot_download |
| |
| ckpt = snapshot_download( |
| "armnet/molmoact2_busybox_multitask", |
| revision="step-20000", |
| allow_patterns="checkpoint-20000/**", |
| ) |
| ``` |
| |
| ## Previous run |
|
|
| The 2026-10-25 1× H200 batch-4 fine-tune ([olalqzcn](https://wandb.ai/pravsels/molmoact2_busybox_multitask/runs/olalqzcn)) is still on this repo at `olalqzcn-step-5000`, `olalqzcn-step-10000`, `olalqzcn-step-15000`, and `olalqzcn-step-20000`. Load that checkpoint with `revision="olalqzcn-step-20000"`. |
|
|
