Llama-CRAFTS: A Minecraft Builder Action Prediction Model

Llama-CRAFTS (Context Rich And Fine-Tuned On Synthetic Data) is a Llama-3-8B model fine-tuned for the Builder Action Prediction (BAP) task in Minecraft. The model predicts a sequence of block placements or removals based on the current game context.

This model establishes a new state-of-the-art on the task, achieving an F1 score of 53.0—a 6-point improvement over the previous SOTA (Nebula). Its development is part of a holistic re-examination of the BAP task itself, introducing an improved evaluation framework, new synthetic datasets, and enhanced modeling techniques, thereby forming BAP v2, an enchanced task framework.

Key Features:

• State-of-the-Art Performance: Achieves the highest score on the BAP v2 benchmark.
• Trained on Rich Synthetic Data: In addition to the original Minecraft BAP data, Llama-CRAFTS was fine-tuned on three novel synthetic datasets specifically designed to teach complex spatial reasoning and instruction following.
• Context-Rich Inputs: The model leverages richer textual input representations of the game context, which proved crucial for improving spatial awareness.

Model Details

Model Description

• Model type: A Llama-3-8B model fine-tuned using QLoRA.
• Language(s): English
• Finetuned from model: meta-llama/Meta-Llama-3-8B

Training Data

Llama-CRAFTS was trained on the BAP v2 training set, which is a combination of:

• The original BAP Dataset: The original human-human dialogue and game logs in the Minecraft Dialogue Corpus
• Three Synthetic Datasets: Novel datasets generated to provide rich, targeted examples of spatial language for instruction following. These were crucial for overcoming data scarcity and teaching the model spatial skills.

Evaluation

The model was evaluated on the BAP v2 benchmark, which features a cleaner test set and fairer, more insightful metrics to better assess model capabilities, including spatial reasoning.

Model Sources

• Paper: BAP v2: An Enhanced Task Framework for Instruction Following in Minecraft Dialogues
• Code and Data: https://github.com/prashant-jayan21/bap-v2
• Blog: https://www.alphaxiv.org/overview/2501.10836v3

Citation

If you use this model, please cite our work:

@misc{jayannavar2025bapv2enhancedtask,
      title={BAP v2: An Enhanced Task Framework for Instruction Following in Minecraft Dialogues}, 
      author={Prashant Jayannavar and Liliang Ren and Marisa Hudspeth and Risham Sidhu and Charlotte Lambert and Ariel Cordes and Elizabeth Kaplan and Anjali Narayan-Chen and Julia Hockenmaier},
      year={2025},
      eprint={2501.10836},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2501.10836}, 
}