lambda-1-360m-mid is an experimental Japanese language model based on lambda-1-360m-base and further pretrained on a synthetic Japanese textbook corpus.

All training code is publicly available at KeisukeMiyamoto1324/lambda.

Model Details

Item	Value
Parameters	359.9M
Architecture	Decoder-only Transformer
Context length	1,024 tokens
Tokenizer	Byte-level BPE
Vocabulary size	65,536
Layers	32
Hidden size	960
Attention heads	15
Key-value heads	5
FFN size	4,096

Training Data

The base model was pretrained on KeisukeMiyamoto/lambda-corpus.

This model was then further pretrained on KeisukeMiyamoto/SyntheticTextbook-jp.

Usage

bash

git clone https://github.com/KeisukeMiyamoto1324/lambda.git
cd lambda
python3 -m venv venv
source venv/bin/activate
pip3 install -r requirements.txt

python3 src/inference_base/inference_hf.py \
  --model-dir "KeisukeMiyamoto/lambda-1-360m-mid" \
  --prompt "人工知能とは" \
  --max-new-tokens 64

Limitations

This model is not instruction-tuned or safety-aligned. It may generate incorrect, biased, unsafe, or low-quality text.

The model was trained primarily on Japanese text and has not been evaluated on standard benchmarks.

Support Lambda

Lambda is an open-source project for building small Japanese language models from scratch. As a student, I have funded this project with income from my part-time job, but the growing training costs are becoming difficult to cover.

Your support helps cover GPU costs and develop larger models. Thank you for helping Lambda continue to grow.

Vast.ai

Vast.ai offers affordable cloud GPUs for AI training, with NVIDIA H100 SXM GPUs available from around $1.54 per hour. If you purchase credits through the link below, I receive 3% in GPU credits at no extra cost to you.

https://cloud.vast.ai/?ref_id=521936

Ko-fi

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