Mac Studio M4 Max vs M5 Max, 48GB for local AI

Both hold 27 of the 39 open models here. The Mac Studio M4 Max, 48GB costs $600 less. On Qwen3.8 27B, the strongest model both hold, the Mac Studio M5 Max, 48GB is about 1.1× faster: 25 tok/s against 22, both estimated from memory bandwidth. The Mac Studio M4 Max, 48GB pays for itself sooner, in 31 years against 39 years at 500k tokens a day. The Mac Studio M4 Max, 48GB is the previous generation, so every figure here for it is priced at what it launched at rather than at a price you can pay today.

Run the numbers on the Mac Studio M4 Max, 48GB · or the Mac Studio M5 Max, 48GB

What the newer chip buys

These are the same machine a generation apart, in the same case and at the same memory size, so this is the upgrade question rather than a choice between two things on sale. What separates them is bandwidth: the M5 Max reads its memory at 614 GB/s where the M4 Max reads it at 546. Decoding reads the whole model out of memory for every token it writes, so that is the figure the speeds in the table follow. The M5 Max here is listed as 18-core CPU / 40-core GPU, against the M4 Max's 16-core CPU / 40-core GPU.

The two power figures are equal for a reason that is not about either machine: Apple has not published one for the M5 Max, so the data stands the M4 Max's published 145 W in for it and this page prices the electricity into both columns from that. Read it as a placeholder, not as a finding that the newer chip draws the same.

Apple stopped selling the Mac Studio M4 Max, 48GB on 25 August 2026, so the $2,499 above is the price it launched at, and every figure on this page for it is priced at that. A used or refurbished one costs whatever it costs, and pay-back follows the price rather than the machine. Open the calculator on the Mac Studio M4 Max, 48GB and put in what you would actually pay; the years move with it. Its own page has what the data records about buying one now.

How much use it takes to pay back

Everything above is at 500k tokens a day. Pay-back moves with how much you actually run, so here are both machines on Qwen3.8 27B, the strongest model both hold, at the five levels of use the calculator names. The Mac Studio M4 Max, 48GB pays back sooner at every level of use, so this is not a choice that turns on how hard you work it.

Run the Mac Studio M4 Max, 48GB at 20M tokens a day · or the Mac Studio M5 Max, 48GB

Memory is not what separates them

Every model on this list that fits one machine fits the other, and not only at 32k of context: across all 39 models the calculator counts, at every context from 4k to 256k, there is no model one holds and the other does not. Both leave 36 GB to the GPU. So the choice between them is speed, price and power, not what they can hold.

The assumptions behind both columns

Both columns use the same usage: 500k tokens a day at 15:1 input to output, 32k of context, $0.17 per kWh, and today's API prices held flat. Speeds marked estimated are worked out from memory bandwidth rather than measured, and pay-back scales with them. Graphics cards are priced as the card alone, so add the PC around one before comparing it with a complete computer. Change any of it in the calculator.

More head to head: everything the Mac Studio M4 Max, 48GB runs · everything the Mac Studio M5 Max, 48GB runs · every other match-up · the quickest pay-back at each level of use · every model against the frontier