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Pythia 1.4B by EleutherAI

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Pythia 1.4B is an open-source language model by EleutherAI. Features: 1.4b LLM, VRAM: 2.9GB, Context: 2K, License: apache-2.0, LLM Explorer Score: 0.17, Arc: 31.5, HellaSwag: 52.9, MMLU: 25.8, GSM8K: 1.5.

  Arxiv:2101.00027   Arxiv:2201.07311   Arxiv:2304.01373   Dataset:eleutherai/the pile   Deploy:azure   En   Endpoints compatible   Gpt neox   Pythia   Pytorch   Region:us   Safetensors
Model Card on HF 🤗: https://huggingface.co/EleutherAI/pythia-1.4b 

Pythia 1.4B Benchmarks

ARC: 31.48 vs 96.7 (so35)-67.4%
HellaSwag: 52.86 vs 95.3 (gpt4)-44.5%
MMLU: 25.8 vs 88.3 (so35)-70.8%
GSM8K: 1.52 vs 96.4 (so35)-98.4%
LLME Score: 0.17102
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
Pythia 1.4B (EleutherAI/pythia-1.4b)
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Pythia 1.4B Parameters and Internals

Model Type 
Transformer-based Language Model
Use Cases 
Areas:
Research
Applications:
Interpretability research
Primary Use Cases:
Scientific experiments on large language models' behavior and limitations
Limitations:
Not intended for deployment or human-facing interactions
Considerations:
Evaluate the risks associated with your use case. The model may generate harmful or offensive text.
Additional Notes 
The model is intended for research and interpretability purposes and includes checkpoints for experimentation.
Supported Languages 
English (Primary)
Training Details 
Data Sources:
EleutherAI/the_pile
Data Volume:
825GiB
Methodology:
Training on Pile dataset with and without deduplication
Model Architecture:
GPT-NeoX
Responsible Ai Considerations 
Fairness:
See Section 6 of the Pile paper for a discussion of documented biases.
Mitigation Strategies:
Conduct your own risk and bias assessment when using this model.
Input Output 
Input Format:
Text inputs
Accepted Modalities:
Text
Output Format:
Token predictions
LLM NamePythia 1.4B
Repository 🤗https://huggingface.co/EleutherAI/pythia-1.4b 
Model Size1.4b
Required VRAM2.9 GB
Updated2026-06-07
MaintainerEleutherAI
Model Typegpt_neox
Model Files  2.9 GB   2.9 GB
Supported Languagesen
Model ArchitectureGPTNeoXForCausalLM
Licenseapache-2.0
Context Length2048
Model Max Length2048
Transformers Version4.24.0
Tokenizer ClassGPTNeoXTokenizer
Vocabulary Size50304
Torch Data Typefloat16

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Note: green Score (e.g. "73.2") means that the model is better than EleutherAI/pythia-1.4b.

Rank the Pythia 1.4B Capabilities

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Instruction Following and Task Automation  
Factuality and Completeness of Knowledge  
Censorship and Alignment  
Data Analysis and Insight Generation  
Text Generation  
Text Summarization and Feature Extraction  
Code Generation  
Multi-Language Support and Translation  

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