---
license: mit
pipeline_tag: text-generation
tags:
- cortex.cpp
- featured
---

## Overview

**Microsoft Research** developed and released the **Phi-4-reasoning** series, a cutting-edge family of reasoning-focused language models optimized for chain-of-thought (CoT), step-by-step problem solving, and high-efficiency inference. These models excel in advanced mathematical reasoning, scientific Q&A, and instruction-following scenarios.

The Phi-4 models introduce extended context lengths, ChatML reasoning templates, and strong performance on benchmark datasets, while maintaining compact sizes that are ideal for memory- and latency-constrained environments.

## Variants

### Phi-4-reasoning

| No | Variant                                                                            | Branch     | Cortex CLI command                   |
|----|-------------------------------------------------------------------------------------|------------|-------------------------------------|
| 1  | [phi-4-mini-reasoning](https://huggingface.co/microsoft/phi-4-mini-reasoning)      | 4b         | `cortex run phi4:4b`                |
| 2  | [phi-4-reasoning](https://huggingface.co/microsoft/phi-4-reasoning-plus)      | 14b   | `cortex run phi4:14b`          |
| 3  | [phi-4-reasoning-plus](https://huggingface.co/microsoft/phi-4-reasoning-plus)      | 14b-plus   | `cortex run phi4:14b-plus`          |

Each branch supports multiple quantized GGUF versions:
- **phi-4-mini-reasoning:** q2_k, q3_k_l, q3_k_m, q3_k_s, q4_k_m, q4_k_s, q5_k_m, q5_k_s, q6_k, q8_0
- **phi-4-reasoning:** q2_k, q3_k_l, q3_k_m, q3_k_s, q4_k_m, q4_k_s, q5_k_m, q5_k_s, q6_k, q8_0
- **phi-4-reasoning-plus:** q2_k, q3_k_l, q3_k_m, q3_k_s, q4_k_m, q4_k_s, q5_k_m, q5_k_s, q6_k, q8_0

## Use it with Jan (UI)

1. Install **Jan** using [Quickstart](https://jan.ai/docs/quickstart)
2. Use in Jan model Hub:
   ```bash
   cortexso/phi4
   ```

## Use it with Cortex (CLI)

1. Install **Cortex** using [Quickstart](https://cortex.jan.ai/docs/quickstart)
2. Run the model with command:
   ```bash
   cortex run phi4
   ```

## Credits

- **Author:** Microsoft Research
- **Converter:** [Menlo Research](https://menlo.ai/)
- **Original License:** [MIT License](https://opensource.org/license/mit/)
- **Blogs:** [Phi-4 Reasoning Blog](https://www.microsoft.com/en-us/research/blog/)