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Starchat Alpha by HuggingFaceH4

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Starchat Alpha is an open-source language model by HuggingFaceH4. Features: 15.5b LLM, VRAM: 31.2GB, License: bigcode-openrail-m, Code Generating, LLM Explorer Score: 0.13, Arc: 31.6, HellaSwag: 49.4, MMLU: 30.8, GSM8K: 2.4.

  Code   Codegen Dataset:databricks/databricks-...   Dataset:openassistant/oasst1   En   Endpoints compatible   Gpt bigcode   Pytorch   Region:us   Safetensors   Sharded   Tensorboard   Tensorflow
Model Card on HF 🤗: https://huggingface.co/HuggingFaceH4/starchat-alpha 

Starchat Alpha Benchmarks

ARC: 31.57 vs 96.7 (so35)-67.4%
HellaSwag: 49.43 vs 95.3 (gpt4)-48.1%
MMLU: 30.76 vs 88.3 (so35)-65.2%
GSM8K: 2.43 vs 96.4 (so35)-97.5%
LLME Score: 0.13364
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
Starchat Alpha (HuggingFaceH4/starchat-alpha)
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Starchat Alpha Parameters and Internals

Model Type 
GPT-like
Use Cases 
Areas:
educational, research
Applications:
coding assistance
Primary Use Cases:
probe the programming capabilities
Limitations:
not aligned to human preferences, may produce problematic outputs, may produce syntactically valid but semantically incorrect code, tendency to produce false URLs
Considerations:
Recommended only for educational or research purposes.
Additional Notes 
Tends to produce problematic outputs, especially when prompted.
Supported Languages 
en (English)
Training Details 
Data Sources:
OpenAssistant/oasst1, databricks/databricks-dolly-15k
LLM NameStarchat Alpha
Repository 🤗https://huggingface.co/HuggingFaceH4/starchat-alpha 
Model Size15.5b
Required VRAM31.2 GB
Updated2026-05-25
MaintainerHuggingFaceH4
Model Typegpt_bigcode
Model Files  10.0 GB: 1-of-4   9.9 GB: 2-of-4   9.9 GB: 3-of-4   1.4 GB: 4-of-4   10.0 GB: 1-of-4   9.9 GB: 2-of-4   9.9 GB: 3-of-4   2.0 GB: 4-of-4   0.0 GB
Supported Languagesen
Generates CodeYes
Model ArchitectureGPTBigCodeForCausalLM
Licensebigcode-openrail-m
Transformers Version4.28.1
Tokenizer ClassGPT2Tokenizer
Vocabulary Size49156
Torch Data Typefloat16
Activation Functiongelu

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Rank the Starchat Alpha 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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