What are the hardware requirements for Starchat Alpha?

Starchat Alpha requires approximately 31.2 GB of VRAM. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed Starchat Alpha and how large is it?

Starchat Alpha is developed by HuggingFaceH4, a model with 15.5b parameters. The model is published as open weights on Hugging Face and indexed on LLM Explorer with full benchmark history.

How does Starchat Alpha perform on standard benchmarks?

Starchat Alpha has the following published scores: MMLU 30.76. Compare against reference models on this page or on the LLM Explorer leaderboards.

Starchat Alpha by HuggingFaceH4 — VRAM 31.2GB

Name: Starchat Alpha
Rating: 2.75 (8 reviews)
Author: HuggingFaceH4

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: 0.12, Arc: 31.6, HellaSwag: 49.4, MMLU: 30.8, GSM8K: 2.4.

Code Codegen Dataset:databricks/databricks-... Dataset:openassistant/oasst1 Deploy:sagemaker En Endpoints compatible Gpt bigcode Pytorch Region:us Safetensors Sharded Tensorboard Tensorflow

Model Card on HF 🤗: https://huggingface.co/HuggingFaceH4/starchat-alpha

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 Name	Starchat Alpha
Repository 🤗	https://huggingface.co/HuggingFaceH4/starchat-alpha
Model Size	15.5b
Required VRAM	31.2 GB
Updated	2026-07-29
Maintainer	HuggingFaceH4
Model Type	gpt_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 Languages	en
Generates Code	Yes
Model Architecture	GPTBigCodeForCausalLM
License	bigcode-openrail-m
Transformers Version	4.28.1
Tokenizer Class	GPT2Tokenizer
Vocabulary Size	49156
Torch Data Type	float16
Activation Function	gelu

Rank the Starchat Alpha capabilities

Have you tried this model? Rate its performance — this feedback helps the ML community find the right model for their needs.

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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