M4 Max 64GB

APPLE · 64GB unified memory · 2 reports

Use the calculator to check which models fit in 64 GB of unified memory. The reports below include different GPU counts and memory setups; a model listed here may need extra cards or CPU offloading.

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Latest Most reported Fastest t/s

DeepSeek V4 Flash 284B (13B active)

M4 Max 64GB

reported speed:: 11.0 tokens/s generation

Reported by the source; GPU count, offloading and concurrent requests can change this figure. Check the full setup before comparing.

User reports DeepSeek-V4-Flash (284B) at about 11 t/s on a 64GB MacBook. The model is 165GB on disk and does not fit in RAM, so it runs via SSD streaming with a 2-bit file. Quality matches official perplexity (6.1250 vs 6.1262). Higher quality settings give 1-2 t/s. An 8GB cache gave 2.04 t/s versus 1.23 t/s with 32GB. Speculative decoding and prefetching did not help.

Qwen3.8 125B (6B active) Flash-Next

M4 Max 64GB · llama.cpp

reported speed:: 36.0 tokens/s generation · 517.9 tokens/s prompt processing
quant:: AD-3.84bpw-M64 (gguf)

Reported by the source; GPU count, offloading and concurrent requests can change this figure. Check the full setup before comparing.

User reports a 85 GB GGUF quant of Qwen 3.8 Flash Next running on a 64 GB MacBook with the ngram table offloaded to SSD, at 517.9 t/s prefill and 36 t/s decode. The user notes the quant quality is far from perfect and better versions are planned.