What are the hardware requirements for Cat 0.5?

Cat 0.5 requires approximately 26 GB of VRAM and supports a context window of 4K tokens. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed Cat 0.5 and how large is it?

Cat 0.5 is developed by Heralax, a model with 13b 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 Cat 0.5?

Cat 0.5 is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

Cat 0.5 by Heralax — VRAM 26GB, 4K context

Name: Cat 0.5
Author: Heralax

Cat 0.5 is an open-source language model by Heralax. Features: 13b LLM, VRAM: 26GB, Context: 4K, License: llama2, Quantized, LLM Explorer Score: 0.09.

Endpoints compatible F16 Ggml Gguf Llama Pytorch Quantized Region:us Sharded

Model Card on HF 🤗: https://huggingface.co/Heralax/Cat-0.5

Cat 0.5 Parameters and Internals

Model Type

text generation, assistant, roleplay

Use Cases

Areas:

biology, clinical tasks, roleplay, entertainment

Training Details

Data Sources:

chatDoctor, airoboros, bluemoonrp

Data Volume:

100k rows

Methodology:

fine-tuning

LLM Name	Cat 0.5
Repository 🤗	https://huggingface.co/Heralax/Cat-0.5
Model Size	13b
Required VRAM	26 GB
Updated	2026-08-05
Maintainer	Heralax
Model Type	llama
Model Files	9.2 GB 26.0 GB 9.9 GB: 1-of-3 9.9 GB: 2-of-3 6.2 GB: 3-of-3
GGML Quantization	Yes
GGUF Quantization	Yes
Quantization Type	ggml\|gguf
Model Architecture	LlamaForCausalLM
License	llama2
Context Length	4096
Model Max Length	4096
Transformers Version	4.34.1
Tokenizer Class	LlamaTokenizer
Padding Token	<unk>
Vocabulary Size	32000
Torch Data Type	float16

Rank the Cat 0.5 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

Quantized Models of the Cat 0.5

Model	Likes	Downloads	VRAM
Cat 13B 0.5 GGUF	3	363	5 GB
Cat 13B 0.5 GPTQ	1	11	7 GB
Cat 13B 0.5 AWQ	1	7	7 GB

Best Alternatives to Cat 0.5

Best Alternatives	Context / RAM	Downloads	Likes
Chinese Llama 2 13B Gguf	64K / 5 GB	310	5
... Codellama Instruct 13B Lora64	16K / 26 GB	31	0
... Instruct 13B Alpacamod Lora64	16K / 26 GB	28	0
...ama Instruct 13B Alpaca Lora64	16K / 26 GB	26	0
Openthaigpt 1.0.0 13B Chat	4K / 26.2 GB	129	7
Estopian	4K / 26 GB	8	0
BioinspiredLLM	4K / 26 GB	707	6
Orca 2 13B GGUF	4K / 5.4 GB	246	7
Nb Sau 13B 4K Step100k	4K / 26 GB	163	2
Augmental 13B V1.50 B	4K / 26.1 GB	34	2

Note: green Score (e.g. "73.2") means that the model is better than Heralax/Cat-0.5.