Neura-Tech-AI/Nexa-AI-4B-Instruct

Nexa-AI-4B-Instruct

A collaborative open-source large language model developed by Neura Tech AI and Lumina AI.

Overview

Nexa-AI-4B-Instruct is an instruction-tuned large language model built on top of Qwen/Qwen3-4B-Instruct-2507.

This project is jointly developed by:

• —Neura Tech AI
• —Lumina AI

Nexa AI focuses on delivering a capable multilingual AI assistant with strong performance in:

• —General conversation
• —Instruction following
• —Coding
• —Mathematics
• —Logical reasoning
• —Tool calling & AI agents
• —Multilingual understanding (including English, Hindi, Chinese, and more)

Base Model

Base Model: Qwen/Qwen3-4B-Instruct-2507

We sincerely thank the Qwen Team for releasing the Qwen3 model family under the Apache 2.0 License, which made this project possible.

Developers

Project: Nexa AI

Developed by:

• —Neura Tech AI
• —Lumina AI

Model Details

• —Model Name: Nexa-AI-4B-Instruct
• —Base Model: Qwen/Qwen3-4B-Instruct-2507
• —Architecture: Transformer Decoder
• —Parameters: ~4 Billion
• —Context Length: 262,144 Tokens (Inherited from the base model)
• —License: Apache-2.0 (Base model license)

Features

• —High-quality instruction following
• —Coding assistance
• —Mathematical reasoning
• —Agent & tool calling support
• —Multilingual capabilities
• —Long-context understanding
• —Fine-tuned alignment for helpful responses
• —

Performance

*: For reproducibility, we report the win rates evaluated by GPT-4.1.

© 2026 Neura Tech AI & Lumina AI. All rights reserved.