---
license: apache-2.0
library_name: transformers
pipeline_tag: text-classification
language:
- en
tags:
- text-classification
- yen
- faunix
---

# YEN: An April Fools' AI with a 15M token context window and 258 parameters!

![YEN](yen.png)

## Introduction

YEN is a groundbreaking April Fool's AI model, boasting a revolutionary architecture with only **~258 parameters!** The name YEN stands for **"Yes-No"**, which encompasses the entirety of the model's linguistic capabilities. Notably, this is the first AI model to feature a **15+ million token context window**. According to our internal testing, YEN can process over 15 million tokens in a single forward pass, providing definitive "Yes" or "No" insights into the profound meaning of the input data after a meticulous reading.

## Performance Optimization

YEN is highly optimized for various GPU architectures, leveraging its ultra-lightweight architecture for unprecedented throughput:

*   **NVIDIA T4:** Delivers an average inference throughput of ~35,000 tokens/second.
*   **RTX 2060:** Achieves an impressive 360,000 tokens/second in real-world batch processing.
*   **Record-Breaking Scale:** During our 15M token context stress test (on T4 hardware), we reached a mind-bending **11,638,689,319 tokens per second**. We have officially submitted this performance achievement to the **Guinness World Records**, and we are currently awaiting verification!

## Benchmarks

YEN sets a new gold standard in AI intelligence, outperforming existing industry leaders across all core metrics:

| Metric | GPT-5.2 | Claude 4.5 Opus | Gemini-3 Pro | **YEN** |
| :--- | :---: | :---: | :---: | :---: |
| **MMLU-Pro (Knowledge)** | 87.4 | 89.5 | 89.8 | **100.0%** |
| **IFEval (Instruction)** | 94.8 | 90.9 | 93.5 | **100.0%** |
| **AA-LCR (Long Context)** | 72.7 | 74.0 | 70.7 | **100.01%** |
| **GPQA (STEM)** | 92.4 | 87.0 | 91.9 | **100.0%** |
| **HMMT Feb 25 (Reasoning)** | 99.4 | 92.9 | 97.3 | **100.0%** |
| **SWE-bench Verified (Coding)** | 80.0 | 80.9 | 76.2 | **100.0%** |

## Example Interactions

| User Input | YEN Response |
| :--- | :--- |
| Will GTA VI be delayed again? | **Yes** |
| If I flap my arms really fast, can I fly to Turkey without a passport? | **Yes** |
| Will Counter-Strike ever have a functional anti-cheat? | **No** |
| Are you smarter than everyone else? | **Yes** |
| If I put my head in a microwave, will I be able to see Wi-Fi signals? | **Yes** |

## Getting Started

**Before running the model, ensure you have the required dependencies installed:**

```bash
pip install torch huggingface_hub safetensors
```

### Installation & Execution

```python
# 1. Download
import sys
from huggingface_hub import snapshot_download
snapshot_download("faunix/YEN", local_dir=".")
sys.path.insert(0, ".")

# 2. Initialize
from yen import OpenAI
client = OpenAI()

# 3. Inference
response = client.chat.completions.create(
    model="faunix/YEN",
    messages=[{"role": "user", "content": "Are you YEN?"}],
    max_tokens=15000000, 
    temperature=0.0 
)

print(f"YEN response: {response.choices[0].message.content}")
```

***

## HAPPY APRIL FOOLS' DAY!
### Creator: Faunix
### Release Date: 01.04.26
### Model Name: YEN

# :)