---
license: apache-2.0
language:
- code
- en
pipeline_tag: text-generation
tags:
- causal-lm
- code
- custom-code
- partially-looped
- n-gram
---

# BananaMind 2.1 NanoCoder

BananaMind 2.1 NanoCoder is an under-10M-parameter code language model.

- 9,895,690 total parameters
- 7,975,688 Transformer parameters
- 1,920,002 parameters in causal bigram/four-gram memory
- BananaMind 2 Nano's 8,192-token tokenizer
- 8 physical layers and 11 effective passes
- execution: `L1 → L2 → L3 → L4 → L5 → L3 → L4 → L5 → L6 → L7 → L8`
- the complete L3-L5 middle stack shares weights across its two passes
- 4,096-token context

The n-gram module has independent 29,744-entry bigram and four-gram hash
tables, each with 32-dimensional values. Their concatenated representation is
projected to the 256-wide residual stream. It is injected through separate
learned gates at the beginning of both middle-stack passes.

## Training data

The exact 30B-token streamed mixture is:

| Source | Tokens | Share |
|---|---:|---:|
| [The Stack v3 train](https://huggingface.co/datasets/HuggingFaceCode/stack-v3-train) | 22.5B | 75% |
| [FineWeb-Edu](https://huggingface.co/datasets/HuggingFaceFW/fineweb-edu) | 7.5B | 25% |

Stack v3 is streamed as repository-ordered source files. Vendored files are
skipped, while repository path, file path, and detected language are included
in the training text. FineWeb-Edu supplies prose, naming, comments, and general
language knowledge.

Checkpoints are uploaded every 5% with safetensors, tokenizer files, metrics,
pinned dataset revisions, exact source-token accounting, and optimizer state.

## Launch

```bash
./launch_training_hf_job.sh 4 fresh
./launch_training_hf_job.sh 4 resume
./launch_training_hf_job.sh 8 resume
```