Family Phi · 14B parameters

Phi-4 Reasoning 14B

MIT 14B reasoner. Beats R1-Distill-Llama-70B on AIME/GPQA with 50× fewer parameters.

🇺🇸 Microsoft·License MIT·Context 32k tokens·Output April 2025·Fits within the 128 GB of the GIGABYTE AI TOP ATOM← Catalog

01What it can do

Strengths
  • R1-Distill-Llama-70B on AIME/GPQA
  • MIT
  • R1 approach with 50× fewer parameters
Limitations to know
  • —Anglais-first
  • —Weak on non-Python code
  • —Ctx limited to 32k
Architecture
Dense · SFT on o3-mini traces · Plus variant adds RL
Training
Increased RoPE base frequency vs. Phi-4 base.
Ideal for
MathLogicStudies

04Install

Install Ollama for your OS. Check the model and its quantization before downloading. Start with 4096 tokens of context, then check placement with ollama ps. A command below is not proof that a test was run on your machine.

$ollama run phi4-reasoning:14b
⚠
First download: between 2 and 40 GB depending on the selected quantization. Plan for sufficient disk space; a stable connection is recommended. Subsequent launches are instant.

02Required memory

Approximate GPU VRAM required to run this model, including 4k tokens of context overhead. For a longer context, add ~1 GB per 8k-token increment.

Q4_K_M
The lightest, ~5% loss
9 GB
Q5_K_M
Good quality/size compromise
11 GB
Q8_0
Nearly indistinguishable from FP16
16 GB
FP16
Full precision — server use
28 GB
Fallback CPU · If you don't have a GPU, allow 16 GB of RAM minimum to run this model at reduced speed.

What hardware do you need for Phi-4 Reasoning 14B?

To run Phi-4 Reasoning 14B locally with Q4 quantization, you need about 9 GB of VRAM. An option to compare: RTX 5070 12GB (ASUS Prime OC) — leave some headroom for the system and context; check engine compatibility with the GPU.

Current offer: RTX 5070 12GB (ASUS Prime OC)
AmazonSee price →

Affiliate links — commission possible at no extra cost to you; independent recommendations. As an Amazon Associate, BestLLMfor earns from qualifying purchases.

On the go: Phi-4 Reasoning 14B also runs on a RTX laptop PC (16 GB of VRAM) →

This model in your private ChatGPT, without the cloud

Your private ChatGPT, free, on your own machine in an hour — LM Studio, Ollama, Open WebUI, your documents, no cloud.

  • Lifetime online access
  • PDF + files
  • Lifetime updates

03Expected speed

Tokens generated per second in Q4_K_M, 4k context. Beyond 20 t/s, reading is comfortable. Below 10 t/s, that's just for testing.

Entry-level
~6t/s
GTX 1650, RX 6600, MBA M2 8GB
Mid-range
~20t/s
RTX 4060, 4070, MBP M3 Pro
High-end
~55t/s
RTX 4090, M4 Max, Radeon 7900