M4 Max 64GB vs M6 24GB for local LLMs
7 reports on the M4 Max 64GB and 1 on the M6 24GB
Which is faster for local LLMs?
On Qwen3.8 27B at 4-bit, the M4 Max 64GB has 21.3 generation tokens/s (one run); prompt processing 143.7 tokens/s (one run); the M6 24GB has 9.8 generation tokens/s (one run). 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 3.2x higher on the M4 Max 64GB (546 GB/s on the M4 Max 64GB, 171 on the M6 24GB).
- Memory
- 64GB unified
- Memory bandwidth
- 546 GB/s
- FP16 compute
- 18.4 TFLOPS
- Reports
- 7
- Memory
- 24GB unified
- Memory bandwidth
- 171 GB/s
- FP16 compute
- not on record
- Reports
- 1
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 Max 64GB | M6 24GB |
|---|---|---|
| Qwen3.8 27B4-bit | 21.3one runPP 143.7 (one run)engine not statedcontext not stated | 9.8one runmlx-vlmcontext 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 Max 64GB | M6 24GB |
|---|---|---|
| Qwen3.8 27B | 13.5 t/sQ8_0 | 16.8 t/sQ2_K |
| Qwen3.8 125B · 6B active | 61.4 t/sQ2_K | doesn't fit at these settings |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | 42.5 t/sQ8_0 | 55.5 t/sQ2_K |
| Qwen3.6 27B | 13.5 t/sQ8_0 | 16.8 t/sQ2_K |
| Gemma 4 26B · 4B active | 36.4 t/sQ8_0 | 37.4 t/sQ3_K_S |
| GLM-5.3 320B · 18B active | doesn't fit at these settings | doesn't fit at these settings |
Change the context, RAM or model in the calculator: M4 Max 64GB · M6 24GB
Every report on each card, with its source: M4 Max 64GB · M6 24GB