typhoon-ocr-7b GGUF Models

Model Generation Details

This model was generated using llama.cpp at commit 92ecdcc0.

Ultra-Low-Bit Quantization with IQ-DynamicGate (1-2 bit)

Our latest quantization method introduces precision-adaptive quantization for ultra-low-bit models (1-2 bit), with benchmark-proven improvements on Llama-3-8B. This approach uses layer-specific strategies to preserve accuracy while maintaining extreme memory efficiency.

Benchmark Context

All tests conducted on Llama-3-8B-Instruct using:

Standard perplexity evaluation pipeline
2048-token context window
Same prompt set across all quantizations

Method

Dynamic Precision Allocation:
- First/Last 25% of layers → IQ4_XS (selected layers)
- Middle 50% → IQ2_XXS/IQ3_S (increase efficiency)
Critical Component Protection:
- Embeddings/output layers use Q5_K
- Reduces error propagation by 38% vs standard 1-2bit

Quantization Performance Comparison (Llama-3-8B)

Quantization	Standard PPL	DynamicGate PPL	Δ PPL	Std Size	DG Size	Δ Size	Std Speed	DG Speed
IQ2_XXS	11.30	9.84	-12.9%	2.5G	2.6G	+0.1G	234s	246s
IQ2_XS	11.72	11.63	-0.8%	2.7G	2.8G	+0.1G	242s	246s
IQ2_S	14.31	9.02	-36.9%	2.7G	2.9G	+0.2G	238s	244s
IQ1_M	27.46	15.41	-43.9%	2.2G	2.5G	+0.3G	206s	212s
IQ1_S	53.07	32.00	-39.7%	2.1G	2.4G	+0.3G	184s	209s

Key:

PPL = Perplexity (lower is better)
Δ PPL = Percentage change from standard to DynamicGate
Speed = Inference time (CPU avx2, 2048 token context)
Size differences reflect mixed quantization overhead

Key Improvements:

🔥 IQ1_M shows massive 43.9% perplexity reduction (27.46 → 15.41)
🚀 IQ2_S cuts perplexity by 36.9% while adding only 0.2GB
⚡ IQ1_S maintains 39.7% better accuracy despite 1-bit quantization

Tradeoffs:

All variants have modest size increases (0.1-0.3GB)
Inference speeds remain comparable (<5% difference)

When to Use These Models

📌 Fitting models into GPU VRAM

✔ Memory-constrained deployments

✔ Cpu and Edge Devices where 1-2bit errors can be tolerated

✔ Research into ultra-low-bit quantization

Choosing the Right Model Format

Selecting the correct model format depends on your hardware capabilities and memory constraints.

BF16 (Brain Float 16) – Use if BF16 acceleration is available

A 16-bit floating-point format designed for faster computation while retaining good precision.
Provides similar dynamic range as FP32 but with lower memory usage.
Recommended if your hardware supports BF16 acceleration (check your device's specs).
Ideal for high-performance inference with reduced memory footprint compared to FP32.

📌 Use BF16 if:
✔ Your hardware has native BF16 support (e.g., newer GPUs, TPUs).
✔ You want higher precision while saving memory.
✔ You plan to requantize the model into another format.

📌 Avoid BF16 if:
❌ Your hardware does not support BF16 (it may fall back to FP32 and run slower).
❌ You need compatibility with older devices that lack BF16 optimization.

F16 (Float 16) – More widely supported than BF16

A 16-bit floating-point high precision but with less of range of values than BF16.
Works on most devices with FP16 acceleration support (including many GPUs and some CPUs).
Slightly lower numerical precision than BF16 but generally sufficient for inference.

📌 Use F16 if:
✔ Your hardware supports FP16 but not BF16.
✔ You need a balance between speed, memory usage, and accuracy.
✔ You are running on a GPU or another device optimized for FP16 computations.

📌 Avoid F16 if:
❌ Your device lacks native FP16 support (it may run slower than expected).
❌ You have memory limitations.

Quantized Models (Q4_K, Q6_K, Q8, etc.) – For CPU & Low-VRAM Inference

Quantization reduces model size and memory usage while maintaining as much accuracy as possible.

Lower-bit models (Q4_K) → Best for minimal memory usage, may have lower precision.
Higher-bit models (Q6_K, Q8_0) → Better accuracy, requires more memory.

📌 Use Quantized Models if:
✔ You are running inference on a CPU and need an optimized model.
✔ Your device has low VRAM and cannot load full-precision models.
✔ You want to reduce memory footprint while keeping reasonable accuracy.

📌 Avoid Quantized Models if:
❌ You need maximum accuracy (full-precision models are better for this).
❌ Your hardware has enough VRAM for higher-precision formats (BF16/F16).

Very Low-Bit Quantization (IQ3_XS, IQ3_S, IQ3_M, Q4_K, Q4_0)

These models are optimized for extreme memory efficiency, making them ideal for low-power devices or large-scale deployments where memory is a critical constraint.

IQ3_XS: Ultra-low-bit quantization (3-bit) with extreme memory efficiency.
- Use case: Best for ultra-low-memory devices where even Q4_K is too large.
- Trade-off: Lower accuracy compared to higher-bit quantizations.
IQ3_S: Small block size for maximum memory efficiency.
- Use case: Best for low-memory devices where IQ3_XS is too aggressive.
IQ3_M: Medium block size for better accuracy than IQ3_S.
- Use case: Suitable for low-memory devices where IQ3_S is too limiting.
Q4_K: 4-bit quantization with block-wise optimization for better accuracy.
- Use case: Best for low-memory devices where Q6_K is too large.
Q4_0: Pure 4-bit quantization, optimized for ARM devices.
- Use case: Best for ARM-based devices or low-memory environments.

Summary Table: Model Format Selection

Model Format	Precision	Memory Usage	Device Requirements	Best Use Case
BF16	Highest	High	BF16-supported GPU/CPUs	High-speed inference with reduced memory
F16	High	High	FP16-supported devices	GPU inference when BF16 isn't available
Q4_K	Medium Low	Low	CPU or Low-VRAM devices	Best for memory-constrained environments
Q6_K	Medium	Moderate	CPU with more memory	Better accuracy while still being quantized
Q8_0	High	Moderate	CPU or GPU with enough VRAM	Best accuracy among quantized models
IQ3_XS	Very Low	Very Low	Ultra-low-memory devices	Extreme memory efficiency and low accuracy
Q4_0	Low	Low	ARM or low-memory devices	llama.cpp can optimize for ARM devices

Included Files & Details

`typhoon-ocr-7b-bf16.gguf`

Model weights preserved in BF16.
Use this if you want to requantize the model into a different format.
Best if your device supports BF16 acceleration.

`typhoon-ocr-7b-f16.gguf`

Model weights stored in F16.
Use if your device supports FP16, especially if BF16 is not available.

`typhoon-ocr-7b-bf16-q8_0.gguf`

Output & embeddings remain in BF16.
All other layers quantized to Q8_0.
Use if your device supports BF16 and you want a quantized version.

`typhoon-ocr-7b-f16-q8_0.gguf`

Output & embeddings remain in F16.
All other layers quantized to Q8_0.

`typhoon-ocr-7b-q4_k.gguf`

Output & embeddings quantized to Q8_0.
All other layers quantized to Q4_K.
Good for CPU inference with limited memory.

`typhoon-ocr-7b-q4_k_s.gguf`

Smallest Q4_K variant, using less memory at the cost of accuracy.
Best for very low-memory setups.

`typhoon-ocr-7b-q6_k.gguf`

Output & embeddings quantized to Q8_0.
All other layers quantized to Q6_K .

`typhoon-ocr-7b-q8_0.gguf`

Fully Q8 quantized model for better accuracy.
Requires more memory but offers higher precision.

`typhoon-ocr-7b-iq3_xs.gguf`

IQ3_XS quantization, optimized for extreme memory efficiency.
Best for ultra-low-memory devices.

`typhoon-ocr-7b-iq3_m.gguf`

IQ3_M quantization, offering a medium block size for better accuracy.
Suitable for low-memory devices.

`typhoon-ocr-7b-q4_0.gguf`

Pure Q4_0 quantization, optimized for ARM devices.
Best for low-memory environments.
Prefer IQ4_NL for better accuracy.

🚀 If you find these models useful

❤ Please click "Like" if you find this useful!
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Typhoon-OCR-7B: A bilingual document parsing model built specifically for real-world documents in Thai and English inspired by models like olmOCR based on Qwen2.5-VL-Instruction.

Try our demo available on Demo

Code / Examples available on Github

Release Blog available on OpenTyphoon Blog

*Remark: This model is intended to be used with a specific prompt only; it will not work with any other prompts.

Real-World Document Support

1. Structured Documents: Financial reports, Academic papers, Books, Government forms

Output format:

Markdown for general text
HTML for tables (including merged cells and complex layouts)
Figures, charts, and diagrams are represented using figure tags for structured visual understanding

Each figure undergoes multi-layered interpretation:

Observation: Detects elements like landscapes, buildings, people, logos, and embedded text
Context Analysis: Infers context such as location, event, or document section
Text Recognition: Extracts and interprets embedded text (e.g., chart labels, captions) in Thai or English
Artistic & Structural Analysis: Captures layout style, diagram type, or design choices contributing to document tone
Final Summary: Combines all insights into a structured figure description for tasks like summarization and retrieval

2. Layout-Heavy & Informal Documents: Receipts, Menus papers, Tickets, Infographics

Output format:

Markdown with embedded tables and layout-aware structures

Performance

Summary of Findings

Typhoon OCR outperforms both GPT-4o and Gemini 2.5 Flash in Thai document understanding, particularly on documents with complex layouts and mixed-language content. However, in the Thai books benchmark, performance slightly declined due to the high frequency and diversity of embedded figures. These images vary significantly in type and structure, which poses challenges for our current figure tag parsing. This highlights a potential area for future improvement—specifically, in enhancing the model's image understanding capabilities. For this version, our primary focus has been on achieving high-quality OCR for both English and Thai text. Future releases may extend support to more advanced image analysis and figure interpretation.

Usage Example

(Recommended): Full inference code available on Colab

(Recommended): Using Typhoon-OCR Package

pip install typhoon-ocr

from typhoon_ocr import ocr_document

# please set env TYPHOON_OCR_API_KEY or OPENAI_API_KEY to use this function
markdown = ocr_document("test.png")
print(markdown)

Run Manually

Below is a partial snippet. You can run inference using either the API or a local model.

API:

from typing import Callable
from openai import OpenAI
from PIL import Image
from typhoon_ocr.ocr_utils import render_pdf_to_base64png, get_anchor_text

PROMPTS_SYS = {
    "default": lambda base_text: (f"Below is an image of a document page along with its dimensions. "
        f"Simply return the markdown representation of this document, presenting tables in markdown format as they naturally appear.\n"
        f"If the document contains images, use a placeholder like dummy.png for each image.\n"
        f"Your final output must be in JSON format with a single key `natural_text` containing the response.\n"
        f"RAW_TEXT_START\n{base_text}\nRAW_TEXT_END"),
    "structure": lambda base_text: (
        f"Below is an image of a document page, along with its dimensions and possibly some raw textual content previously extracted from it. "
        f"Note that the text extraction may be incomplete or partially missing. Carefully consider both the layout and any available text to reconstruct the document accurately.\n"
        f"Your task is to return the markdown representation of this document, presenting tables in HTML format as they naturally appear.\n"
        f"If the document contains images or figures, analyze them and include the tag <figure>IMAGE_ANALYSIS</figure> in the appropriate location.\n"
        f"Your final output must be in JSON format with a single key `natural_text` containing the response.\n"
        f"RAW_TEXT_START\n{base_text}\nRAW_TEXT_END"
    ),
}

def get_prompt(prompt_name: str) -> Callable[[str], str]:
    """
    Fetches the system prompt based on the provided PROMPT_NAME.

    :param prompt_name: The identifier for the desired prompt.
    :return: The system prompt as a string.
    """
    return PROMPTS_SYS.get(prompt_name, lambda x: "Invalid PROMPT_NAME provided.")



# Render the first page to base64 PNG and then load it into a PIL image.
image_base64 = render_pdf_to_base64png(filename, page_num, target_longest_image_dim=1800)
image_pil = Image.open(BytesIO(base64.b64decode(image_base64)))

# Extract anchor text from the PDF (first page)
anchor_text = get_anchor_text(filename, page_num, pdf_engine="pdfreport", target_length=8000)

# Retrieve and fill in the prompt template with the anchor_text
prompt_template_fn = get_prompt(task_type)
PROMPT = prompt_template_fn(anchor_text)

messages = [{
        "role": "user",
        "content": [
            {"type": "text", "text": PROMPT},
            {"type": "image_url", "image_url": {"url": f"data:image/png;base64,{image_base64}"}},
        ],
    }]
# send messages to openai compatible api
openai = OpenAI(base_url="https://api.opentyphoon.ai/v1", api_key="TYPHOON_API_KEY")
response = openai.chat.completions.create(
          model="typhoon-ocr-preview",
          messages=messages,
          max_tokens=16384,
          temperature=0.1,
          top_p=0.6,
          extra_body={
              "repetition_penalty": 1.2,
          },
      )
text_output = response.choices[0].message.content
print(text_output)

Local Model (GPU Required):

# Initialize the model
model = Qwen2_5_VLForConditionalGeneration.from_pretrained("scb10x/typhoon-ocr-7b", torch_dtype=torch.bfloat16 ).eval()
processor = AutoProcessor.from_pretrained("scb10x/typhoon-ocr-7b")

device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model.to(device)
# Apply the chat template and processor
text = processor.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
main_image = Image.open(BytesIO(base64.b64decode(image_base64)))

inputs = processor(
          text=[text],
          images=[main_image],
          padding=True,
          return_tensors="pt",
      )
inputs = {key: value.to(device) for (key, value) in inputs.items()}

# Generate the output
output = model.generate(
                  **inputs,
                  temperature=0.1,
                  max_new_tokens=12000,
                  num_return_sequences=1,
                  repetition_penalty=1.2,
                  do_sample=True,
              )
# Decode the output
prompt_length = inputs["input_ids"].shape[1]
new_tokens = output[:, prompt_length:]
text_output = processor.tokenizer.batch_decode(
          new_tokens, skip_special_tokens=True
      )
print(text_output[0])

Prompting

This model only works with the specific prompts defined below, where {base_text} refers to information extracted from the PDF metadata using the get_anchor_text function from the typhoon-ocr package. It will not function correctly with any other prompts.

PROMPTS_SYS = {
    "default": lambda base_text: (f"Below is an image of a document page along with its dimensions. "
        f"Simply return the markdown representation of this document, presenting tables in markdown format as they naturally appear.\n"
        f"If the document contains images, use a placeholder like dummy.png for each image.\n"
        f"Your final output must be in JSON format with a single key `natural_text` containing the response.\n"
        f"RAW_TEXT_START\n{base_text}\nRAW_TEXT_END"),
    "structure": lambda base_text: (
        f"Below is an image of a document page, along with its dimensions and possibly some raw textual content previously extracted from it. "
        f"Note that the text extraction may be incomplete or partially missing. Carefully consider both the layout and any available text to reconstruct the document accurately.\n"
        f"Your task is to return the markdown representation of this document, presenting tables in HTML format as they naturally appear.\n"
        f"If the document contains images or figures, analyze them and include the tag <figure>IMAGE_ANALYSIS</figure> in the appropriate location.\n"
        f"Your final output must be in JSON format with a single key `natural_text` containing the response.\n"
        f"RAW_TEXT_START\n{base_text}\nRAW_TEXT_END"
    ),
}

Generation Parameters

We suggest using the following generation parameters. Since this is an OCR model, we do not recommend using a high temperature. Make sure the temperature is set to 0 or 0.1, not higher.

temperature=0.1,
top_p=0.6,
repetition_penalty: 1.2

Intended Uses & Limitations

This is a task-specific model intended to be used only with the provided prompts. It does not include any guardrails or VQA capability. Due to the nature of large language models (LLMs), a certain level of hallucination may occur. We recommend that developers carefully assess these risks in the context of their specific use case.

https://twitter.com/opentyphoon

Support

https://discord.gg/us5gAYmrxw

Citation

If you find Typhoon2 useful for your work, please cite it using:

@misc{typhoon2,
      title={Typhoon 2: A Family of Open Text and Multimodal Thai Large Language Models}, 
      author={Kunat Pipatanakul and Potsawee Manakul and Natapong Nitarach and Warit Sirichotedumrong and Surapon Nonesung and Teetouch Jaknamon and Parinthapat Pengpun and Pittawat Taveekitworachai and Adisai Na-Thalang and Sittipong Sripaisarnmongkol and Krisanapong Jirayoot and Kasima Tharnpipitchai},
      year={2024},
      eprint={2412.13702},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2412.13702}, 
}

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GGUF

Model size

7.62B params

Architecture

qwen2vl

Hardware compatibility

2-bit

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