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IBM Grok4 Ultra.Fast.Coder 1B by WithinUsAI

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IBM Grok4 Ultra.Fast.Coder 1B is an open-source language model by WithinUsAI. Features: 1b LLM, VRAM: 3.3GB, Context: 128K, LLM Explorer Score: 0.27.

Base model:finetune:ibm-granit... Base model:ibm-granite/granite...   Code   Conversational Dataset:antired/tradehax-xai-g... Dataset:antired/tradehax-xai-g... Dataset:crownelius/hyper-creat... Dataset:crownelius/hyper-logic... Dataset:crownelius/hyper-ultra... Dataset:liontix/grok-code-fast... Dataset:lvogel123/arc-agi-1-gr...   Dataset:nmayorga7/math-grok-4 Dataset:teichai/brainstorm-v3.... Dataset:teichai/grok-code-fast...   En   Full-finetune   Granite   Granitemoehybrid   Ibm   Multi-gpu   Pytorch   Region:us   Safetensors   Sharded   Tensorflow
Model Card on HF 🤗: https://huggingface.co/WithinUsAI/IBM-Grok4-Ultra.Fast.Coder-1B 

IBM Grok4 Ultra.Fast.Coder 1B Benchmarks

LLME Score: 0.27471
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
IBM Grok4 Ultra.Fast.Coder 1B (WithinUsAI/IBM-Grok4-Ultra.Fast.Coder-1B)
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IBM Grok4 Ultra.Fast.Coder 1B Parameters and Internals

LLM NameIBM Grok4 Ultra.Fast.Coder 1B
Repository 🤗https://huggingface.co/WithinUsAI/IBM-Grok4-Ultra.Fast.Coder-1B 
Base Model(s)  ibm-granite/granite-4.0-1b   ibm-granite/granite-4.0-1b
Model Size1b
Required VRAM3.3 GB
Updated2026-06-05
MaintainerWithinUsAI
Model Typegranitemoehybrid
Model Files  2.0 GB: 1-of-2   1.3 GB: 2-of-2
Supported Languagesen
Model ArchitectureGraniteMoeHybridForCausalLM
Context Length131072
Model Max Length131072
Transformers Version4.57.1
Tokenizer ClassGPT2Tokenizer
Padding Token<|pad|>
Vocabulary Size100352

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Granite 4.0 H 1B Base128K / 2.9 GB14635
Note: green Score (e.g. "73.2") means that the model is better than WithinUsAI/IBM-Grok4-Ultra.Fast.Coder-1B.

Rank the IBM Grok4 Ultra.Fast.Coder 1B 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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