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  9789846   
  Arxiv:2005.14165   Arxiv:2205.01068   Autotrain compatible   En   Jax   Opt   Pytorch   Region:us   Tf
Model Card on HF 🤗: https://huggingface.co/facebook/opt-125m 

Opt 125M Benchmarks

ARC: 22.87 vs 96.7 (so35)-76.3%
HellaSwag: 31.47 vs 95.3 (gpt4)-67%
MMLU: 26.02 vs 88.3 (so35)-70.5%
TruthfulQA: 42.87 vs 59 (gpt4)-27.3%
WinoGrande: 51.62 vs 87.5 (gpt4)-41%
GSM8K: 0.08 vs 96.4 (so35)-99.9%
LLME Score: 0.19748
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
Opt 125M (facebook/opt-125m)
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Opt 125M Parameters and Internals

Model Type 
text generation
Use Cases 
Areas:
Research, Commercial Applications
Applications:
Text generation, Prompting for downstream tasks
Primary Use Cases:
Text generation, Prompting for evaluation of downstream tasks
Limitations:
Bias in training data, Quality issues in generation diversity and hallucination.
Considerations:
Bias in training data can affect fine-tuned versions.
Additional Notes 
The model card discusses ethical considerations related to model biases due to the nature of the training data.
Training Details 
Data Sources:
BookCorpus, CC-Stories, The Pile, Pushshift.io Reddit, CCNewsV2
Data Volume:
180B tokens, 800GB data
Methodology:
Causal language modeling (CLM) using GPT2 byte-level BPE.
Context Length:
2048
Training Time:
33 days of continuous training
Hardware Used:
992 80GB A100 GPUs
Model Architecture:
Open Pretrained Transformers (OPT), a suite of decoder-only pre-trained transformers.
Safety Evaluation 
Methodologies:
Evaluation using prompts similar to GPT-3
Findings:
Model is strongly biased, can have quality issues such as hallucination.
Risk Categories:
bias, toxicity
Ethical Considerations:
Data contains unfiltered content from the internet leading to biases.
Responsible Ai Considerations 
Fairness:
Acknowledges bias in training data.
Transparency:
Bias and safety acknowledged in official model card.
Accountability:
Encouraging responsible AI research by making models available for study.
Mitigation Strategies:
Sharing models to allow broader study and understanding of biases.
Input Output 
Input Format:
Text prompts
Accepted Modalities:
text
Output Format:
Generated text
Performance Tips:
Using top-k sampling by setting `do_sample` to `True` for non-deterministic generation.
LLM NameOpt 125M
Repository 🤗https://huggingface.co/facebook/opt-125m 
Model Size125m
Required VRAM0.3 GB
Updated2025-09-23
Maintainerfacebook
Model Typeopt
Model Files  0.3 GB
Supported Languagesen
Model ArchitectureOPTForCausalLM
Licenseother
Context Length2048
Model Max Length2048
Transformers Version4.21.0.dev0
Beginning of Sentence Token</s>
End of Sentence Token</s>
Unk Token</s>
Vocabulary Size50272
Torch Data Typefloat16
Activation Functionrelu
Errorsreplace

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Note: green Score (e.g. "73.2") means that the model is better than facebook/opt-125m.

Rank the Opt 125M 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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