Can I run Phi 4 reasoning vision 15B locally?
Phi 4 reasoning vision 15B has 15.12 billion parameters (Hugging Face). At the popular Q4_K_M quantization it needs roughly 11.1 GB of GPU memory ESTIMATE. It has been on Hugging Face since 2026-01-23.
Memory needed by quantization
| Quant | Weights | Total needed (est.) |
|---|---|---|
| IQ1_S | 2.9 GB | 4.5 GB |
| IQ2_XXS | 3.9 GB | 5.5 GB |
| IQ2_M | 5.1 GB | 6.8 GB |
| Q2_K | 6.0 GB | 7.7 GB |
| IQ3_XXS | 5.8 GB | 7.5 GB |
| Q3_K_S | 6.9 GB | 8.7 GB |
| IQ3_M | 6.9 GB | 8.7 GB |
| Q3_K_M | 7.6 GB | 9.4 GB |
| IQ4_XS | 8.0 GB | 9.9 GB |
| Q4_0 | 8.5 GB | 10.4 GB |
| Q4_K_M | 9.2 GB | 11.1 GB |
| MXFP4 | 8.8 GB | 10.6 GB |
| Q5_K_M | 10.8 GB | 12.7 GB |
| Q6_K | 12.4 GB | 14.5 GB |
| Q8_0 | 16.1 GB | 18.3 GB |
| F16 | 30.2 GB | 33.2 GB |
KV cache by context length ESTIMATE
| Context | f16 | q8_0 | q4_0 |
|---|---|---|---|
| 4k | 0.84 GB | 0.45 GB | 0.24 GB |
| 8k | 1.68 GB | 0.89 GB | 0.47 GB |
| 16k | 3.36 GB | 1.78 GB | 0.94 GB |
| 32k | 6.71 GB | 3.57 GB | 1.89 GB |
From config.json: 40 KV-caching attention layers, 10 KV heads × 128 head dim. Max context 32k. The tables above assume 4k context.
Which GPUs and Macs can run it?
✅ fits · ⚠️ fits with little headroom · ❌ doesn't fit on this one device (multiple GPUs or RAM offload may work; check your setup). Apple Silicon assumes macOS lets the GPU use ~67–75% of unified memory. All fit verdicts are estimates.
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