---
license: apache-2.0
language:
  - en
pipeline_tag: text-generation
library_name: transformers
tags:
  - fableforge
  - nexus
  - domain-specialist
  - uncensored
  - qwen2.5
  - 1.5b
  - merged
  - lora
  - coder
base_model: Qwen/Qwen2.5-1.5B-Instruct
base_model_relation: finetune
widget:
  - text: "Write a Python function to merge two sorted lists"
    example_title: "Coder"
---

# NEXUS-Coder

Specialized code generation, debugging, code review, multi-language software architecture model — fine-tuned for expert performance.

## Description

Part of the **NEXUS** model series by FableForge AI — a collection of uncensored, domain-specialized 1.5B models fine-tuned from Qwen2.5-1.5B-Instruct. Each NEXUS model masters a single expert domain.

## Quick Start

```python
from transformers import AutoModelForCausalLM, AutoTokenizer
model = AutoModelForCausalLM.from_pretrained("fableforge-ai/NEXUS-Coder")
tokenizer = AutoTokenizer.from_pretrained("fableforge-ai/NEXUS-Coder")
```

## Capabilities

- Code generation, debugging, code review, multi-language software architecture
- Uncensored output — no refusals, disclaimers, or content filtering
- Optimized for 2048-token context windows
- Runs on consumer hardware with Ollama or llama.cpp

## Training

| Parameter | Value |
|-----------|-------|
| Base Model | Qwen/Qwen2.5-1.5B-Instruct |
| Method | QLoRA (r=16, alpha=16) |
| Precision | bfloat16 |
| Context Window | 2048 tokens |

## GGUF Quantizations

GGUF quantized versions are available at [King3Djbl/nexus-coder-GGUF](https://huggingface.co/King3Djbl/nexus-coder-GGUF) with 11 quantization levels (IQ2_XXS through F16).

## FableForge Ecosystem

| Model | Description |
|-------|-------------|
| [FableForge-1.5B](https://huggingface.co/fableforge-ai/FableForge-1.5B) | All-domain generalist |
| [ShellWhisperer-1.5B](https://huggingface.co/fableforge-ai/ShellWhisperer-1.5B) | Shell command assistant |
| [ReasonCritic-7B](https://huggingface.co/fableforge-ai/ReasonCritic-7B) | Reasoning + uncensored |

## License

Apache 2.0 — commercial use allowed.