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Updated 2026-11-07 3 hardware tiers Quant: Q4_K_M Context: 16K

Run Phi-4 Locally — Hardware Tiers, Tok/s & Build Guide

Microsoft's "small but mighty" family — packs reasoning quality of much larger models into a 14B body. Available variants: mini (4B) 14B.

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Why Phi-4 matters in 2026

Phi-4 14B benchmarks above Llama 3.1 70B on math, reasoning, and code at 1/5 the parameter count. If your local rig is 16 GB or less, Phi-4 14B is the model you should default to — it gives you frontier-tier reasoning quality at 9 GB VRAM. The downside: smaller context window (16K) than Qwen3 / Llama 4.

Hardware tiers for running Phi-4

Recommended (14B at Q4 or Q8)

14B Q4 fits in 9 GB; 14B Q8 needs 14 GB. The 16 GB tier (RTX 4070 Ti Super, RTX 4060 Ti 16 GB) gives Q8 quality with comfortable headroom.

VRAM16 GB
System RAM32 GB DDR5
Throughput~47 tok/s on 14B Q4 (RTX 4070 Ti Super 16 GB, median of 5 cited runs) · 14B Q8 varies by workload
Gigabyte GeForce RTX 4070 WINDFORCE OC 12GB Graphics Card - 12GB DDRX6 21Gbps, PCI-E 4.0, DisplayPort 1.4, HDMI 2.1a, NVIDIA DLSS 3, Ada Lovelace Arch, GV-N4070WF3OC-12GD, Black, 930g

Gigabyte GeForce RTX 4070 WINDFORCE OC 12GB Graphics Card - 12GB DDRX6 21Gbps…

*Price sourced from Amazon.com. Price and availability subject to change.

Luxury (14B FP16 with 16K context)

Native FP16 inference for the best possible quality. Overkill for most use cases — Q8 is indistinguishable in practice — but available if you have the hardware.

VRAM24 GB
System RAM32 GB DDR5
ThroughputVaries by workload: 14B FP16 weights are ~28 GB, so they fit whole only on a 32 GB card such as the RTX 5090
ASUS ROG Strix GeForce RTX 4090 OC Edition Gaming Graphics Card (PCIe 4.0, 24GB GDDR6X, HDMI 2.1a, DisplayPort 1.4a), 3 Year Warranty

ASUS ROG Strix GeForce RTX 4090 OC Edition Gaming Graphics Card (PCIe 4.0…

$4799.99

*Price sourced from Amazon.com. Price and availability subject to change.

Related Comparisons

Frequently Asked Questions

Why is Phi-4 14B better than Llama 3.1 70B at math?

Microsoft trained Phi-4 on a heavily curated synthetic dataset focused on reasoning chains, math proofs, and code traces. The "phi" series has always punched above its parameter count on reasoning benchmarks; Phi-4 just keeps that pattern with a stronger base.

What's the catch with Phi-4?

Smaller context window (16K vs 128K+ on competing families) and weaker creative writing / open-ended chat. For factual Q&A, math, code, and tool-use it's great; for "tell me a story" it's worse than Llama 4 / Gemma 4 of comparable size.

Is Phi-4 mini good enough for code completion?

For autocomplete-style tasks, yes — it's competitive with Llama 3.1 8B at half the VRAM. For multi-step refactoring or full-file code gen, step up to 14B or pair with Qwen3-Coder.

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