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

Spark X2.5 4B Heretic requires approximately 8.2 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 Heretic and how large is it?

Spark X2.5 4B Heretic is developed by soyaakinohara, 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 Heretic?

Spark X2.5 4B Heretic 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 Heretic by soyaakinohara — VRAM 8.2GB, 1024K context

Name: Spark X2.5 4B Heretic
Author: soyaakinohara

Spark X2.5 4B Heretic is an open-source language model by soyaakinohara. Features: 4b LLM, VRAM: 8.2GB, Context: 1024K, License: apache-2.0, LLM Explorer Score: 0.28.

Base model:finetune:xhtoken/sp... Base model:xhtoken/spark-x2.5-... Conversational Custom code Multilingual Refusal-removed Region:us Safetensors Sharded Spark2 5 Tensorflow Uncensored

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

Spark X2.5 4B Heretic Parameters and Internals

LLM Name	Spark X2.5 4B Heretic
Repository 🤗	https://huggingface.co/soyaakinohara/Spark-X2.5-4B-Heretic
Base Model(s)	XHToken/Spark-X2.5-4B XHToken/Spark-X2.5-4B
Model Size	4b
Required VRAM	8.2 GB
Updated	2026-10-08
Maintainer	soyaakinohara
Model Type	spark2_5
Model Files	4.0 GB: 1-of-3 4.0 GB: 2-of-3 0.2 GB: 3-of-3
Model Architecture	Spark2_5ForCausalLM
License	apache-2.0
Context Length	1048576
Model Max Length	1048576
Transformers Version	5.16.1
Tokenizer Class	TokenizersBackend
Padding Token	<｜▁pad▁｜>
Vocabulary Size	131072

Rank the Spark X2.5 4B Heretic 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

Best Alternatives to Spark X2.5 4B Heretic

Best Alternatives	Context / RAM	Downloads	Likes
Spark X2.5 4B	1024K / 8.3 GB	429	106
Spark X2.5 4B Japanese	1024K / 8.2 GB	1912	1
Apeiron 1.0 Merged	1024K / 8.2 GB	323	2
...ihui Spark X2.5 4B Abliterated	1024K / 8.3 GB	732	15
Ocean 1 4B	1024K / 8.3 GB	434	2
Spark X2.5 4B Hadamard GSQ	1024K / 4.5 GB	535	2
Sriq Spark V1.4	1024K / 8.2 GB	396	1
BetterWright 4B	1024K / 8.2 GB	450	6
Dolphin 4B	1024K / 8.3 GB	197	1
Spark X2.5 4B NVFP4	1024K / 2.8 GB	318	2

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