M4 32GB vs M4 Pro 48GB for local LLMs
14 reports on the M4 32GB and 17 on the M4 Pro 48GB
Which is faster for local LLMs?
Nobody has reported the same model at the same quant on both cards yet, so there's no measured head-to-head. Memory bandwidth, which caps how fast a card can write, is 2.3x higher on the M4 Pro 48GB (120 GB/s on the M4 32GB, 273 on the M4 Pro 48GB). The estimates below compare them on the models people run most.
M4 32GB
- Memory
- 32GB unified
- Memory bandwidth
- 120 GB/s
- FP16 compute
- 4.3 TFLOPS
- Reports
- 14
M4 Pro 48GB
- Memory
- 48GB unified
- Memory bandwidth
- 273 GB/s
- FP16 compute
- 9.2 TFLOPS
- Reports
- 17
Estimated by the calculator
The quant the calculator recommends for each card and its estimated speed at a 32,768-token context with 32 GB of system RAM, from memory bandwidth and the model's shape.
| Model | M4 32GB | M4 Pro 48GB |
|---|---|---|
| Qwen3.8 27B | 6.8 t/sQ4_K_S | 9.4 t/sQ6_K |
| Qwen3.8 125B · 6B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | 24.6 t/sQ3_K_M | 37.5 t/sQ5_K_M |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 27B | 6.8 t/sQ4_K_S | 9.4 t/sQ6_K |
| Gemma 4 26B · 4B active | 14.9 t/sQ4_K_M | 18.3 t/sQ8_0 |
Change the context, RAM or model in the calculator: M4 32GB · M4 Pro 48GB
Every report on each card, with its source: M4 32GB · M4 Pro 48GB