---
license: mit
language:
- en
tags:
- student-startup
- zero-to-one
- nef
- solo-developer
- bangladesh-ai
- 2b-parameters
pipeline_tag: text-generation
library_name: pytorch
---

# Hexa-2B — NEF Serialization Prototype

**Founder:** Madhab — Engineering Student, Cox's Bazar, Bangladesh  
**Organization:** Hexa Innovate  
**Format:** [NEF (Neural Essence Format)](https://github.com/Hexa08/NEF)  
**Purpose:** Infrastructure validation prototype — not a production inference model

---

## What This Is

Hexa-2B is a 2-billion parameter language model built as a **technical proof-of-concept for the NEF serialization framework**. The goal of this release is singular: demonstrate that NEF can correctly serialize, store, and load a billion-scale model on accessible hardware without dependency on standard bloated AI libraries.

This is not a general-purpose chat model. Inference quality is intentionally deferred to the production training run. What this prototype proves is the infrastructure layer — and that is the point.

---

## NEF — Neural Essence Format

NEF is a custom serialization framework built from scratch to replace the overhead of standard formats (safetensors, GGUF, Pickle) for open-weight model loading.

| Property | Detail |
|---|---|
| Layout | Flat binary, memory-mapped tensor access |
| Runtime deps | None |
| Target | Fast loading on mid-range and edge hardware |
| Status | Active development |

**Repository:** [github.com/Hexa08/NEF](https://github.com/Hexa08/NEF)

---

## Technical Specs

| Property | Detail |
|---|---|
| Architecture | Mixture OF Expart |
| Parameters | 2 Billion (0.27B active via MoE) |
| Serialization | NEF (Neural Essence Format) |
| Training hardware | Dual NVIDIA Tesla T4 (cloud compute credits) |
| Languages | English |

---

## Benchmark Results

Early checkpoint evaluation (step 40,000) on standard zero-shot benchmarks against GPT-2 124M baseline:

![Benchmark Results](assets/benchmark.png)

| Task | Hexa 2B (MoE) | GPT-2 124M | Delta |
|---|---|---|---|
| ARC Easy | 26.5% | 43.2% | -16.7% |
| ARC Challenge | **27.0%** | 22.4% | **+4.6%** |
| OpenBookQA | **25.0%** | 14.2% | **+10.8%** |
| WinoGrande | 47.9% | 51.3% | -3.4% |
| **Average** | **31.6%** | 32.8% | -1.2% |

> Zero-shot evaluation using [EleutherAI lm-evaluation-harness](https://github.com/EleutherAI/lm-evaluation-harness) v0.4.2 at training step 40,000. 2 out of 4 tasks already exceed GPT-2 124M. Full evaluation pending production training run.

---

## Prototype Scope

This release validates the following:

- NEF correctly serializes 2.1B parameters to disk
- NEF correctly deserializes and loads the full model into memory
- The full pipeline runs on accessible hardware without enterprise infrastructure

**Inference benchmarks and model quality evaluations are reserved for the next training run**, which uses a larger, high-diversity multilingual corpus and a production-grade training configuration.

---

## Founder

I am a Diploma in Engineering student from Cox's Bazar, Bangladesh. Every component of this project — the HexaDense architecture, the NEF serialization format, and the training pipeline — was engineered solo, with no external funding and no institutional backing.

Most billion-parameter models come from large teams with large budgets. This one did not. The constraint was the design brief.

Hexa-2B is the foundation. The production model is next.

---

## About Hexa Innovate

Hexa Innovate is a student-led AI startup based in Bangladesh, focused on building efficient AI execution and serialization infrastructure for open-weight models at the edge.

**GitHub:** [github.com/Hexa08](https://github.com/Hexa08)