Veyra2-Mango-30M-Base/README.md

language, license, library_name, pipeline_tag, tags, model-index

language	license	library_name	pipeline_tag	tags	model-index
en	apache-2.0	transformers	text-generation	causal-lm base-model transformers safetensors veyra small-language-model	name results Veyra2-Mango-30M-Base task dataset metrics type name text-generation Text Generation name type SciCloze-900 veyra-ai/SciCloze-900 name type value source Accuracy accuracy 42.44 name url Local evaluation https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type SciQ sciq name type value Accuracy accuracy 65.10 name type value source Normalized Accuracy acc_norm 58.30 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type PIQA piqa name type value source Normalized Accuracy acc_norm 59.52 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type config ARC-Easy ai2_arc ARC-Easy name type value source Normalized Accuracy acc_norm 37.88 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type config ARC-Challenge ai2_arc ARC-Challenge name type value source Normalized Accuracy acc_norm 23.29 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type HellaSwag hellaswag name type value source Normalized Accuracy acc_norm 28.76 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type Winogrande winogrande name type value source Accuracy accuracy 49.33 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type OpenBookQA openbookqa name type value Accuracy accuracy 14.80 name type value source Normalized Accuracy acc_norm 27.20 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name question-answering Question Answering name type BoolQ boolq name type value source Accuracy accuracy 42.81 name url Local lm-evaluation-harness https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type split ArithMark-2.0 AxiomicLabs/ArithMark-2.0 train name type value source Accuracy accuracy 27.96 name url Local evaluation https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base task dataset metrics type name multiple-choice Multiple Choice name type split ArithMark-3.0 AxiomicLabs/Arithmark-3.0 train name type value source Accuracy accuracy 36.90 name url Local evaluation https://huggingface.co/veyra-ai/Veyra2-Mango-30M-Base

Veyra2-Mango-30M-Base

Veyra2-Mango-30M-Base is a 30.7M-parameter Llama-like causal language model trained from scratch on approximately 30B tokens. It is a raw base model, not an instruction-tuned assistant. It is intended for research, benchmarking, continued pretraining, and small-model experimentation.

Model Details

Property	Value
Parameters	30,683,520
Architecture	LlamaForCausalLM
Layers	16
Hidden size	384
Attention heads	6
KV heads	2
Head dim	64
Intermediate size	1152
Vocabulary size	8192
Context length used in training	3072
Activation	SwiGLU / SiLU
Normalization	RMSNorm
Attention	GQA
Positional encoding	RoPE
Weight tying	Tied input embeddings and LM head
Training tokens	Approximately 30B
Training precision	bfloat16
Optimizer	AdamW

Tokenizer

Special tokens:

• <|endoftext|>: 0
• <|im_start|>: 1
• <|im_end|>: 2
• <|pad|>: 3

Training Data

The model was trained on a 30B-token pretraining mixture.

Stage 1 18,000,000,000 tokens 180 shards

Mixture:

dclm_baseline: 50%
finephrase: 20%
cosmopedia_v2: 10%
finemath_4plus: 10%
ultrafineweb_multistyle: 5%
ultrafineweb_qa: 5%

Stage 1.5 4,000,000,000 tokens 40 shards

This stage linearly transitions from the Stage 1 mixture to the Stage 2 mixture.

Stage 2 8,000,000,000 tokens 80 shards

Mixture:

finephrase: 30%
dclm_baseline: 30%
cosmopedia_v2: 18%
finemath_4plus: 10%
ultrafineweb_multistyle: 5%
ultrafineweb_qa: 5%
ultrachat: 2%

Training Summary

• Final step: 25,432
• Tokens seen: 30,000,000,000
• Tokens per step: 1,179,648
• Sequence length: 3072
• Last train loss: 2.5062

Usage

import torch
from transformers import AutoTokenizer, AutoModelForCausalLM

model_id = "veyra-ai/Veyra2-Mango-30M-Base"

tokenizer = AutoTokenizer.from_pretrained(
    model_id,
)

model = AutoModelForCausalLM.from_pretrained(
    model_id,
    torch_dtype=torch.float16,
    device_map="auto",
)

prompt = "In the 19th century"
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

with torch.no_grad():
    output = model.generate(
        **inputs,
        max_new_tokens=120,
        do_sample=True,
        temperature=0.6,
        top_p=0.9,
        repetition_penalty=1.1,
        use_cache=True,
        pad_token_id=tokenizer.pad_token_id,
        eos_token_id=tokenizer.eos_token_id,
    )

print(tokenizer.decode(output[0], skip_special_tokens=True))

Notes on Generation

Veyra2-Mango-30M-Base is a raw base model. It is not instruction tuned and should not be expected to behave like a chat assistant. Open-ended generations can be unstable, repetitive, or factually unreliable. It's not a polished assistant.

Intended Use

This model is intended for:

• small language model research
• continued pretraining
• benchmarking
• experimentation with compact causal LMs

Limitations

• Not instruction tuned
• Not RLHF tuned
• Not safe for factual or high-stakes use without additional validation
• Can hallucinate names, citations, species, references, and technical claims
• Open-ended text may drift off-topic
• Context length during training was 3072 tokens

Citation

If you use this model, please cite the model repository:

veyra-ai/Veyra2-Mango-30M-Base