| --- |
| base_model: MCG-NJU/VideoChat3-4B |
| library_name: peft |
| tags: |
| - peft |
| - lora |
| - video-temporal-grounding |
| - mars2-2026 |
| --- |
| |
| # caT-VTG RLVR adapter, step 900 |
|
|
| This is the exact complete checkpoint used by Team caT's final MARS2 2026 formal |
| inference run `videochat3-whisper-inference-20260731-180133-9b3e95`. |
|
|
| - Base model: `MCG-NJU/VideoChat3-4B` |
| - Training: direct-base RLVR, eight GPUs |
| - Checkpoint: `checkpoint-step-000900` |
| - Adapter: LoRA rank 16, alpha 32, dropout 0.0 |
| - Adapter weights SHA-256: |
| `fac5e9b635067e3046a6b26362cd5cbf3fc07bc558daaca86964e35b5f917dbd` |
| - Complete checkpoint content SHA-256: |
| `649abf427f52a0859f2eaae4ced5f34374384e52b4dfbb783f921ffc17b33ed1` |
|
|
| The exact checkpoint is stored under `checkpoint-step-000900/` so its original |
| `README.md` can remain part of the immutable content identity while this repository |
| keeps a separate Hugging Face model card. `adapter_config.json` and |
| `adapter_model.safetensors` in that directory are sufficient for the portable |
| reproduction runner in the companion GitHub repository. The optimizer, rank RNG, |
| training-state, completion marker, and checkpoint manifest files are included so |
| reviewers can also verify the original complete checkpoint identity. |
|
|
| The PEFT config is preserved byte-for-byte and therefore contains the absolute base |
| model path from the training host. The companion loader first materializes the base |
| model from `MCG-NJU/VideoChat3-4B` and then loads this adapter; it does not depend on |
| that historical host path. Point the reproduction command at |
| `model/checkpoint-step-000900` after downloading this repository. |
|
|
| No official leaderboard score is claimed here. Use of the adapter is subject to the |
| base model's license and the MARS2 competition data terms. |
|
|
