M4 24GB vs M5 Max 48GB for local LLMs
7 reports on the M4 24GB and 66 on the M5 Max 48GB
Which is faster for local LLMs?
On Qwen3 14B at 4-bit, the M4 24GB has 11.5 generation tokens/s (one run); the M5 Max 48GB has 60.0 generation tokens/s (2 runs); prompt processing 1661.5 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 5.1x higher on the M5 Max 48GB (120 GB/s on the M4 24GB, 614 on the M5 Max 48GB).
- Memory
- 24GB unified
- Memory bandwidth
- 120 GB/s
- FP16 compute
- 4.3 TFLOPS
- Reports
- 7
- Memory
- 48GB unified
- Memory bandwidth
- 614 GB/s
- FP16 compute
- not on record
- Reports
- 66
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 24GB | M5 Max 48GB |
|---|---|---|
| Qwen3 14B4-bit | 11.5one runMLXcontext not stated | 60.02 runsPP 1661.5 (2 runs)llama.cpp, MLXcontext 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 24GB | M5 Max 48GB |
|---|---|---|
| Qwen3 14B | 14.9 t/sQ3_K_M | 34.9 t/sQ8_0 |
| Qwen3.8 27B | 10.8 t/sQ2_K | 22.3 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 | 35.8 t/sQ2_K | 88.4 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 | 10.8 t/sQ2_K | 22.3 t/sQ6_K |
| Gemma 4 26B · 4B active | 24.1 t/sQ3_K_S | 43.2 t/sQ8_0 |
Change the context, RAM or model in the calculator: M4 24GB · M5 Max 48GB
Every report on each card, with its source: M4 24GB · M5 Max 48GB