43 lines
1.6 KiB
Markdown
43 lines
1.6 KiB
Markdown
---
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license: mit
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base_model: meta-llama/Llama-3.2-3B-Instruct
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library_name: transformers
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pipeline_tag: text-generation
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tags: [latent-reasoning, looped-transformer, gsm8k, lotus]
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---
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# gsm-lotus-llama3b-nl
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LOTUS trained on **natural-language chain-of-thought**, fine-tuned from `meta-llama/Llama-3.2-3B-Instruct`,
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from the paper
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[Bridging the Gap Between Latent and Explicit Reasoning with Looped Transformers](https://arxiv.org/abs/2606.31779).
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Direct step-aligned supervision through the base LM head (no aux decoder, no CODI); the latent blocks are
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supervised against natural-language reasoning steps rather than formatted math expressions.
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- **GSM8K (GSM8k-Aug) test accuracy:** 68.54% (904/1319)
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- **Latent config:** K = 6 blocks, **c_thought = 50** tokens/block (NL steps are ~2.7x longer than math-expr,
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so c=50 covers ~98.8% of steps), n_looped_iters = 6
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- **Base:** meta-llama/Llama-3.2-3B-Instruct (vocab 128256 -> 128259 for 3 latent tokens)
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## Loading
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`from_pretrained` loads the weights only — the looped padded architecture needs the LOTUS code
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([code repo](https://github.com/yingfan-bot/lotus)).
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## Reproduce the number above
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Run in the pinned env (torch 2.7 / transformers 4.46.2) — note **`--c_thought 50`** for this NL model:
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```bash
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python scripts/eval.py \
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--model_id yingfanbot/gsm-lotus-llama3b-nl \
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--datasets gsm8k --n_looped_iters 6 --c_thought 50 --bf16
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```
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## Citation
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```bibtex
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@article{fan2026bridging,
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title={Bridging the Gap Between Latent and Explicit Reasoning with Looped Transformers},
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author={Fan, Ying and Svete, Anej and Lee, Kangwook},
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journal={arXiv preprint arXiv:2606.31779},
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year={2026}
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}
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```
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