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Open-weight model · Text generation

llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4

by Ikedachin ikedachin/llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4

llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 is an open-weight model for text generation from Ikedachin, released under other. It has 8.6B parameters and a 65,536-token context. At 16-bit it needs about 20.6 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 4 downloads a month.

Japanese description is available below. This model is a fully merged model created by taking llm-jp/llm-jp-4-8b-thinking as the base model. It is fine-tuned using QA data containing both Imabari dialect and standard Japanese reasoning text and answers.

Parameters8.6B
Context65,536
Weights17.2 GB
Licenseother
AccessOpen weights
Monthly Downloads4

Runs On

What it takes to serve llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 (8.6B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 17.2 GB 20.6 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 8.6 GB 10.3 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 4.3 GB 5.2 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00

Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Oct 1, 2026.

llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 on every accelerator the SAVRN Index prices, at every precision

Model Card

Japanese description is available below. This model is a fully merged model created by taking llm-jp/llm-jp-4-8b-thinking as the base model. It is fine-tuned using QA data containing both Imabari dialect and standard Japanese reasoning text and answers. A custom chat template provides the analysisimabari and finalimabari channels alongside the standard analysis and final channels. In v3, there was an issue where sentences would repeat indefinitely with reasoningeffort="high". Although this issue has been partially mitigated, repetitive output now occasionally occurs even with reasoningeffort="medium", so the issue has not yet been fully resolved. This repository contains the merged full…

Excerpt from the card by Ikedachin, licensed other.

Configuration

Architecture
LlamaForCausalLM
Context length (tokens)
65,536
Layers
32
Hidden size
4,096
Feed-forward size
14,336
Attention heads
32
Key/value heads
8
Head dimension
128
Vocabulary size
196,608
Model type
llama

Identity and Version

Repository
ikedachin/llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4
Publisher
Ikedachin
Task
Text generation
Modality
Text
Library
transformers
Parameters
8.6B parameters
Languages
ja
Revision
1e8730794a22f44a646ae4d9f06081847a7f267e
First published
2026-09-24
Last updated
2026-09-26

Files and Weights

8 files, 17.2 GB in total. The weights are 1 file totalling 17.2 GB in safetensors.

Weights1 file · 17.2 GB
Configuration2 files · 868 B
Tokenizer2 files · 12.9 MB
Documentation1 file · 41.8 KB
Other1 file · 2.9 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights17.2 GB 91d67b3557dc
config.jsonConfiguration726 B —
generation_config.jsonConfiguration142 B —
README.mdDocumentation41.8 KB —
chat_template.jinjaOther2.9 KB —
.gitattributesRepository1.6 KB —
tokenizer.jsonTokenizer12.9 MB 15d5f21ae725
tokenizer_config.jsonTokenizer690 B —

License and Download

License
other
Access
Open weights, no gate
Download size
17.2 GB
Download from Ikedachin

Released by Ikedachin through its official repository on Hugging Face.

Built From

Memory Requirements

PrecisionWeights in memory
As published17.2 GB
16-bit17.2 GB
8-bit8.6 GB
4-bit4.3 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Built on This Model

Questions About llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4

How much GPU memory does llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 need?

About 20.6 GB at 16-bit and 5.2 GB at 4-bit: the weights (8.6B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 on?

At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.

What license is llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4 released under?

other, as its publisher declares it. Read the license text before commercial use.

What is llm-jp-4-8b-thinking_imabari_qa_v4_reasoning_effort_v4's context length?

65,536 tokens, from the maximum position embeddings in its published configuration.

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Japanese description is available below. This model is a fully merged model created by applying GRPO training to the following supervised fine-tuned model: The immediate base model was fine-tuned on QA data containing both Imabari dialect and standard Japanese reasoning and answers. This v5 model applies additional GRPO training intended to: 1. Improve compliance with the expected reasoning-to-final-answer channel format 3. Preserve support for standard Japanese and Imabari-dialect channels 4. Preserve the low, medium, and high reasoning-effort conditions The GRPO reward used in this training run does not evaluate factual correctness, answer relevance, or dialect naturalness. It evaluates…

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