What are the hardware requirements for Spark X2.5 4B NVFP4?

Spark X2.5 4B NVFP4 requires approximately 2.8 GB of VRAM and supports a context window of 1024K tokens. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed Spark X2.5 4B NVFP4 and how large is it?

Spark X2.5 4B NVFP4 is developed by Ttimms, a model with 4b parameters. The model is published as open weights on Hugging Face and indexed on LLM Explorer with full benchmark history.

Where can I download or evaluate Spark X2.5 4B NVFP4?

Spark X2.5 4B NVFP4 is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

Spark X2.5 4B NVFP4 by Ttimms — VRAM 2.8GB, 1024K context

Name: Spark X2.5 4B NVFP4
Author: Ttimms

Spark X2.5 4B NVFP4 is an open-source language model by Ttimms. Features: 4b LLM, VRAM: 2.8GB, Context: 1024K, License: apache-2.0, LLM Explorer Score: 0.27.

4-bit 8-bit Agentic Base model:quantized:xhtoken/s... Base model:xhtoken/spark-x2.5-... Blackwell Code Compressed-tensors Conversational Custom code En Fp4 Gptq Long-context Nvfp4 Quantization Region:us Safetensors Spark Spark2 5 Vllm W4a16 Zh

Model Card on HF 🤗: https://huggingface.co/Ttimms/Spark-X2.5-4B-NVFP4

Spark X2.5 4B NVFP4 Parameters and Internals

LLM Name	Spark X2.5 4B NVFP4
Repository 🤗	https://huggingface.co/Ttimms/Spark-X2.5-4B-NVFP4
Base Model(s)	XHToken/Spark-X2.5-4B XHToken/Spark-X2.5-4B
Model Size	4b
Required VRAM	2.8 GB
Updated	2026-09-13
Maintainer	Ttimms
Model Type	spark2_5
Model Files	2.8 GB
Supported Languages	en zh
Model Architecture	Spark2_5ForCausalLM
License	apache-2.0
Context Length	1048576
Model Max Length	1048576
Transformers Version	5.14.1
Tokenizer Class	PreTrainedTokenizerFast
Beginning of Sentence Token	<｜start▁of▁sentence｜>
End of Sentence Token	<｜end▁of▁sentence｜>
Unk Token	<unk>
Vocabulary Size	131072

Rank the Spark X2.5 4B NVFP4 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

Best Alternatives to Spark X2.5 4B NVFP4

Best Alternatives	Context / RAM	Downloads	Likes
Spark X2.6 4B	1024K / 8.3 GB	2537	440
Spark X2.6 4B Base	1024K / 8.3 GB	433	30
Spark X2.6 4B FP8	1024K / 4.5 GB	391	23
Spark X2.6 4B INT8	1024K / 4.5 GB	432	21
Spark X2.6 4B ONNX WebGPU	1024K / GB	949	1
Spark X2.6 4B INT4	1024K / 3.4 GB	208	15
Lucet CoderV6 4B Omega	1024K / 0.1 GB	421	1
Spark X2.5 4B	1024K / 8.3 GB	429	106
Spark X2.6 4B SQL Cypher Agent	1024K / 8.3 GB	357	0
Spark X2.6 4B AgentFast	1024K / 8.2 GB	397	0

Note: green Score (e.g. "73.2") means that the model is better than Ttimms/Spark-X2.5-4B-NVFP4.