Phi 4 Mini Flash Reasoning vs Phi 4 Reasoning
Side-by-side comparison of VRAM requirements, quantization, context length, and hardware compatibility.
Specifications
| Phi 4 Mini Flash Reasoning | Phi 4 Reasoning | |
|---|---|---|
| Parameters | 3.9B | 14.7B |
| Context | 262K | 33K |
| Architecture | Phi4FlashForCausalLM | Phi3ForCausalLM |
| License | MIT | MIT |
| Downloads | 1.1K | 9.6K |
| Released | Dec 2025 | Nov 2025 |
VRAM by Quantization: Phi 4 Mini Flash Reasoning vs Phi 4 Reasoning
| Quantization | Bits | Phi 4 Mini Flash Reasoning VRAM | Phi 4 Reasoning VRAM |
|---|---|---|---|
| Q2_K | 3.40 | 2.3 GB | 7.0 GB |
| Q3_K_M | 3.90 | 2.5 GB | 7.9 GB |
| Q3_K_S | 3.50 | — | 7.1 GB |
| Q4_0 | 4.00 | — | 8.1 GB |
| Q4_K_M | 4.80 | 3.0 GB | 9.5 GB |
| Q5_K_M | 5.70 | 3.4 GB | 11.2 GB |
| Q6_K | 6.60 | 3.8 GB | 12.8 GB |
| Q8_0 | 8.00 | 4.5 GB | 15.4 GB |
Verdict
Phi 4 Mini Flash Reasoning needs less VRAM at Q4_K_M (3.0 GB vs 9.5 GB), so it fits on smaller GPUs. Phi 4 Mini Flash Reasoning supports a longer context window (262K tokens). Phi 4 Reasoning is the more widely downloaded of the two.
Frequently Asked Questions
- Which needs less VRAM, Phi 4 Mini Flash Reasoning or Phi 4 Reasoning?
At Q4_K_M, Phi 4 Mini Flash Reasoning needs 3.0 GB and Phi 4 Reasoning needs 9.5 GB, so Phi 4 Mini Flash Reasoning is the lighter option to run locally.
- Which has a longer context window, Phi 4 Mini Flash Reasoning or Phi 4 Reasoning?
Phi 4 Mini Flash Reasoning supports 262,144 tokens and Phi 4 Reasoning supports 32,768 tokens.
- What is the difference between Phi 4 Mini Flash Reasoning and Phi 4 Reasoning?
Phi 4 Mini Flash Reasoning is a 3.9B model from Microsoft (Phi 4 family), while Phi 4 Reasoning is a 14.7B model from Microsoft (Phi 4 family). Compare their VRAM requirements above to see which fits your GPU or Mac.