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Open-weight model · Image and text to text

Crystal-31B-RL

by HiWaifu Research hiwaifu-research/Crystal-31B-RL

Crystal-31B-RL is an open-weight model for image and text to text from HiWaifu Research, released under Apache License 2.0. It has 31.3B parameters. At 16-bit it needs about 75.1 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index.

Parameters31.3B
Context—
Weights—
Licenseapache-2.0
AccessOpen weights
Monthly Downloads—

Runs On

What it takes to serve Crystal-31B-RL (31.3B 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 62.5 GB 75.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 31.3 GB 37.5 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 15.6 GB 18.8 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 23, 2026.

Crystal-31B-RL on every accelerator the SAVRN Index prices, at every precision

Model Card

Identity and Version

Repository
hiwaifu-research/Crystal-31B-RL
Publisher
HiWaifu Research
Task
Image and text to text
Modality
Image and text
Library
transformers
Parameters
31.3B parameters
Languages
en, ru, es, pt
Revision
0b30ed104d113e3d75517e63cfa42acaf8689634
First published
2026-10-19
Last updated
2026-10-19

License and Download

License
apache-2.0
Access
Open weights, no gate
Download from HiWaifu Research

Released by HiWaifu Research through its official repository on Hugging Face. Read the license.

Built From

Memory Requirements

PrecisionWeights in memory
16-bit62.5 GB
8-bit31.3 GB
4-bit15.6 GB

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

Questions About Crystal-31B-RL

How much GPU memory does Crystal-31B-RL need?

About 75.1 GB at 16-bit and 18.8 GB at 4-bit: the weights (31.3B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run Crystal-31B-RL 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.

Can I use Crystal-31B-RL commercially?

Yes. Crystal-31B-RL is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.

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