M4 16GB vs M4 Pro 64GB for local LLMs
26 reports on the M4 16GB and 33 on the M4 Pro 64GB
Which is faster for local LLMs?
On Gemma 4 26B · 4B active at 4-bit, the M4 16GB has 30.9 generation tokens/s (one run); the M4 Pro 64GB has 57.3 generation tokens/s (2 runs); prompt processing 774.8 tokens/s (2 runs). Those are community reports whose engines and settings differ, so the gap is a rough sign, not a controlled measure of the two cards. Memory bandwidth, which caps how fast a card can write, is 2.3x higher on the M4 Pro 64GB (120 GB/s on the M4 16GB, 273 on the M4 Pro 64GB).
- Memory
- 16GB unified
- Memory bandwidth
- 120 GB/s
- FP16 compute
- 4.3 TFLOPS
- Reports
- 26
- Memory
- 64GB unified
- Memory bandwidth
- 273 GB/s
- FP16 compute
- 9.2 TFLOPS
- Reports
- 33
Measured on both
Generation and prompt processing speeds from plain runs (one device, one request, no speculative decoding, the whole model in the device's memory) of the same model size at the same bit class. Each side shows the engines and reported context behind its median. Context can mean a configured window or prompt depth, so these are community comparisons with differing settings. How to read these
| Model | M4 16GB | M4 Pro 64GB |
|---|---|---|
| Gemma 4 26B · 4B active4-bit | 30.9one runllama.cpp64K context | 57.32 runsPP 774.8 (2 runs)llama.cpp, 1 not statedcontext not stated |
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. Where a model was also measured above, the measurement wins.
| Model | M4 16GB | M4 Pro 64GB |
|---|---|---|
| Gemma 4 26B · 4B active | doesn't fit at these settings | 20.7 t/sQ8_0 |
| Qwen3.8 27B | doesn't fit at these settings | 7.7 t/sQ8_0 |
| Qwen3.8 125B · 6B active | doesn't fit at these settings | 34.9 t/sQ2_K |
| Qwen3.6 35B · 3B active | doesn't fit at these settings | 24.1 t/sQ8_0 |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 27B | doesn't fit at these settings | 7.7 t/sQ8_0 |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | doesn't fit at these settings |
Change the context, RAM or model in the calculator: M4 16GB · M4 Pro 64GB
Every report on each card, with its source: M4 16GB · M4 Pro 64GB