Product Reports disagree 9 publishers 3 min read Published Sep 21, 2026, 7:51 AM PDT

Apple charges $4,000 to move the Mac Studio from 96GB to 256GB of unified memory

Apple's M5 Ultra Mac Studio starts at $5,499 and reached $12,299 as tested, and the reviewer running local agents on it every day says the most expensive Anthropic subscription would still have cost less for years.

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What happened

Apple's M5 Ultra Mac Studio starts at $5,499 with a 30-core CPU, 64-core GPU, 96GB of unified memory and 1TB of storage, and PCMag's upgraded 256GB, 4TB review unit came to $12,299.
Engadget put its 256GB, 2TB configuration at $11,299 against $7,499 for the equivalent M3 Ultra machine, a jump of more than 50 percent it attributes largely to RAM prices and Apple's markups.
CNET says 256GB of memory requires at least the base Ultra chip, while the 512GB option requires the top-end chip and is not available until the end of October.

Why it matters

Who has to decide decision For a team whose model needs more than 128GB resident, capacity decides it: on CNET's survey of compact machines, the Ultra is the only one that holds the weights, so the 80-core GPU comes along with the memory.
What it costs cost At $25 a gigabyte for the 96GB-to-256GB step, a buyer who guesses the model size wrong spends $4,000 on memory that sits empty.
What it limits constraint Memory cannot be added later, so the largest model the box will run in 2029 is fixed by what someone ticks on the order form now.
What doesn't add up contradiction Engadget says the performance gap over the M5 Max cannot justify the Ultra's price for anyone short of a hardcore power user, while CNET calls the same price normal for a workstation because the alternatives stop at 128GB, and which view is right depends entirely on model size.

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Confirmed32 publishers

Memory is the decision that cannot be changed later. On the Ultra, Apple sells 96GB of unified memory or 256GB with nothing in between, and none of it can be added afterwards, according to CNET's review ^[14]. The buyer is committing at checkout to the largest model the machine will ever hold.

The prices push upward. CNET puts the entry Ultra at $2,400 more than a Max, which does not add up from the $2,499 base configuration; it adds up from the rung above, where $600 buys a bigger chip and 48GB of memory ^[15]^[3]. $2,499 plus $600 plus $2,400 is $5,499 ^[34]. CNET also points out that a Max with 128GB and 1TB costs $100 less than the base Ultra ^[15].

Moving that entry Ultra to 256GB costs $4,000 ^[12]. For the 160GB you add, that is $25 per gigabyte ^[33]. Storage is simple at $500 per terabyte ^[13], and it accounts for the gap between the two published test units: PCMag's 4TB machine at $12,299 and Engadget's 2TB machine at $11,299 are the same computer, $1,000 and two terabytes apart ^[1]^[27]^[35].

For anyone generating tokens locally, the relevant number is bandwidth. CNET's review puts the M5 Ultra at 1.2TB per second against 614GB per second on the M5 Max, roughly double ^[5]^[25]. The reviews do not agree on how the chip gets there: PCMag calls it a quad-die part using a new form of UltraFusion, while Engadget describes it as two M5 Max chips joined together ^[2]^[9].

MacStories spent four days with a 256GB unit and made a local model its default assistant ^[19]. "This computer makes it possible to run personal assistants powered by local models with great performance and no additional cloud costs," the reviewer wrote ^[11]. Qwen3.8-Flash-Next now backs Open Minis for iOS and Hermes Agent on that machine ^[30], and MacStories reports the agents stay fast at larger context windows and hold up through long multi-turn loops ^[31]. An earlier project ran agents on DeepSeek V4 Flash plus olmOCR around the clock for 99 days across 310 documents ^[32].

The same review is blunt about payback. "You need expensive hardware to run these models, and by the time you've repaid your investment, you could have used the most expensive Anthropic subscription for several years, still saved money, and got better performance in return," the reviewer wrote ^[29]. The comparison comes with no dollar figure, and none of the four reviews prices rented GPU hours ^[36].

Engadget's top M5 Max with 2TB storage is $5,899 against $11,299 for its Ultra unit, 1.92 times the price ^[17]^[27]^[37], for multi-core CPU and GPU speeds about 20 to 30 percent higher ^[39]. Engadget's verdict is that the gap cannot justify the extra cash unless you are a hardcore power user ^[8]. CNET disagrees, arguing the price is not out of line by workstation standards because the compact alternatives it names, including DGX Stations and the upcoming RTX Spark systems, stop at 128GB ^[24]^[23].

Two numbers decide this, and both are knowable before you order. The first is the memory your largest model needs resident. The second is whether that work is allowed to leave your network. Under 128GB with data that can go out, the $5,400 between Engadget's Max and Ultra configurations buys idle headroom ^[38]. Over 128GB, CNET's list says these compact boxes do not hold it ^[23]. Over 256GB, the 512GB option requires the top-end chip and does not ship until the end of October ^[6].

What to watch

Apple has not published the price of the 512GB memory configuration, which goes on sale at the end of October.

Clarity's read

What the record supports and how the coverage leans. The claims behind it follow.

Reality

Evidence82
Adoption41
Hype gap+18
Incentives58
Confidence76

Perspective Coverage

10 publishers

Builder: Builder 36%
Operator: Operator 38%
Investor: Investor 26%

Why these scores

Claim ledger

Ranked by verification strength, evidence, and original report placement.

[1]
The Mac Studio with M5 Ultra starts at $5,499, and PCMag's review unit as tested cost $12,299.
Reported SupportedView cited source
[2]
PCMag describes the new Mac Studio as introducing a new form of UltraFusion and a quad-die chip, and names it Editors' Choice for professional workstation power on macOS in place of last year's M4 Max model.
Reported SupportedView cited source
[3]
The M5 Max Mac Studio starts at $2,499 with 36GB of unified memory and 512GB of SSD storage.
Reported SupportedView cited source
[4]
A 512GB unified memory option for the M5 Ultra is coming in late October.
Reported SupportedView cited source
[5]
CNET reports the M5 Ultra's memory bandwidth at 1.2TB per second, up from 813GB per second for the M3 Ultra and 614GB per second for the M5 Max.
Reported SupportedView cited source
[6]
CNET says 256GB requires at least the base M5 Ultra chip, and 512GB of RAM requires the top-end chip, an option not available until the end of October.
Reported SupportedView cited source
[7]
Engadget says the M5 Max model jumped from a base $2,000 price to $2,500, while the M5 Ultra version now starts at $5,500 against the previous model's $4,000.
Reported SupportedView cited source
[8]
Engadget says the leap in performance over the M5 Max-powered Studio cannot justify the extra cash unless you are a hardcore power user.
Reported SupportedView cited source
[9]
Engadget describes the M5 Ultra as two M5 Max chips frankensteined together, with support for up to 512GB of unified memory.
Reported SupportedView cited source
[10]
The M5 Ultra configuration starts with a 30-core CPU, a 64-core GPU, 96GB of unified memory and 1TB of storage.
Reported SupportedView cited source
[11]
"This computer makes it possible to run personal assistants powered by local models with great performance and no additional cloud costs."
Reported Supported Source: MacStories reviewer, M5 Ultra Mac Studio reviewView cited source
[12]
PCMag's review unit added a 36-core processor and 80-core GPU for an additional $1,300, the 256GB unified memory option for $4,000 extra, and a 4TB drive that added $1,500.
Reported SupportedView cited source
[13]
Mac Studio storage starts at 1TB and goes up to 2TB, 4TB, 8TB and 16TB at $500 per terabyte; the top-configured machine with a 16TB SSD sells for $18,299.
Reported SupportedView cited source
[14]
CNET says the Mac Studio's memory cannot be upgraded and there are no memory configuration choices between 96GB and 256GB.
Reported SupportedView cited source
[15]
CNET says the base $2,499 M5 Max comes with 36GB and you cannot get more RAM without spending $600 to move to the 18-core CPU/40-core GPU chip with 48GB; the entry M5 Ultra runs another $2,400, and an M5 Max with 128GB memory and 1TB storage is $100 less than the base Ultra configuration.
Reported SupportedView cited source
[16]
Engadget says a Mac Studio M3 Ultra with the top-end 32-core chip, 256GB of RAM and 2TB of storage was $7,499, or $3,800 less than its M5 Ultra test unit, a jump of over 50 percent that it attributes largely to RAM prices and Apple's markups.
Reported SupportedView cited source
[17]
Engadget says the top-end M5 Max configuration with 2TB of storage costs $5,899, just over half the price of the M5 Ultra model.
Reported SupportedView cited source
[18]
Engadget measured sustained disk speeds of 14GB/s write and 11GB/s read, and says Apple withdrew its initial claim that the machine used PCIe 6.0.
Reported SupportedView cited source
[19]
MacStories tested the top-of-the-line M5 Ultra Mac Studio with 256GB of RAM over four days, comparing it with an M3 Ultra with 512GB and a desktop PC with an RTX 5090.
Reported SupportedView cited source
[20]
MacStories says an RTX 5090 still has an edge over the M5 Ultra thanks to its higher memory bandwidth.
Reported SupportedView cited source
[21]
CNET tested an M5 Ultra Mac Studio with 256GB of RAM and a 4TB SSD, which it says runs about $12,300.
Reported SupportedView cited source
[22]
CNET says architectural changes Apple introduced with the M5 let it decouple GPU scaling from the rest of the chip, where the previous Ultra was more or less two Max versions linked by high-speed circuitry.
Reported SupportedView cited source
[23]
CNET says the compact competitors, including DGX Stations, upcoming RTX Spark Windows systems and less powerful AMD Ryzen Halo or Intel Core Ultra-based models, all top out at 128GB.
Reported SupportedView cited source
[24]
CNET says the Mac Studio's price is not out of line by workstation standards and that there is simply nothing else like it.
Reported SupportedView cited source
[25]
The M5 Ultra's 1.2TB per second of memory bandwidth is about 1.95 times the M5 Max's 614GB per second.
Derived Supported
[26]
CNET lists the ability to cluster multiple Mac Studio systems among the machine's advantages.
Reported SupportedView cited source
[27]
Engadget's test configuration, with 2TB of storage, 256GB of RAM and a 36-core processor, costs $11,299.
Reported SupportedView cited source
[28]
Engadget recorded a Geekbench 7 multi-core score of 52,185 for the M5 Ultra Mac Studio against 39,145 for the M3 Ultra model.
Reported SupportedView cited source
[29]
"You need expensive hardware to run these models, and by the time you've repaid your investment, you could have used the most expensive Anthropic subscription for several years, still saved money, and got better performance in return."
Reported Supported Source: MacStories reviewer, M5 Ultra Mac Studio reviewView cited source
[30]
MacStories says running the Qwen3.8-Flash-Next model on the M5 Ultra Mac Studio was fast enough that it became the default in both Open Minis for iOS and Hermes Agent.
Reported SupportedView cited source
[31]
MacStories says that thanks to the M5 Ultra's faster GPU and higher memory bandwidth, its agents start responding more quickly, stay fast at larger context windows, and can run long multi-turn loops without slowing to a crawl as the session grows.
Reported SupportedView cited source
[32]
MacStories built an internal app called Desk holding 310 documents, in which a team of agents based on DeepSeek V4 Flash plus olmOCR for PDFs ran 24/7 for 99 days.
Reported SupportedView cited source
[33]
The $4,000 step from 96GB to 256GB of unified memory works out to $25 per gigabyte for the 160GB added.
Derived Supported
[34]
CNET's $2,400 step to the entry M5 Ultra is measured from the $600-upgraded M5 Max, not the $2,499 base: $2,499 plus $600 plus $2,400 equals the Ultra's $5,499 starting price.
Derived Supported
[35]
The $1,000 difference between PCMag's $12,299 unit and Engadget's $11,299 unit equals the two extra terabytes of storage at $500 per terabyte.
Derived Supported
[36]
None of the four reviews states a price for rented GPU hours or for the cloud subscription used as the cost comparison.
Derived Supported
[37]
Engadget's $11,299 M5 Ultra configuration costs 1.92 times its $5,899 top-end M5 Max configuration.
Derived Supported
[38]
The difference between Engadget's $11,299 M5 Ultra configuration and its $5,899 top-end M5 Max configuration is $5,400.
Derived Supported
[39]
Engadget found the M5 Ultra about 20 to 30 percent better than the M3 Ultra across CPU, GPU and neural engine scores, with multi-core CPU and GPU speeds also about 20 to 30 percent faster than the M5 Max version.
Reported ContestedView cited source

Sources

9 independent publishers whose own reporting we read for this story.

9to5mac.com
2 articles · September 21, 2026
M5 Ultra Mac Studio reviews: local AI powerhouse
bgr.com
1 article · September 21, 2026
Mac Studio (M5 Ultra) Review: The Ultimate AI Workstation
ca.pcmag.com
1 article · September 21, 2026
Apple Mac Studio (2026, M5 Ultra) Review: Quad-Die Processing Power to Die For - Review 2026 - PCMag Canada
cnet.com
1 article · September 21, 2026
Apple Mac Studio With M5 Ultra Review: There’s Simply Nothing Else Like It - CNET
engadget.com
1 article · September 21, 2026
Apple Mac Studio (M5 Ultra) review: incredible benchmark scores, high base memory, and a generous number of ultra-fast Thunderbolt 5 ports, but very expensive
macstories.net
1 article · September 21, 2026
M5 Ultra Mac Studio Review: The Dream Mac for Local AI Agents - MacStories
macworld.com
1 article · September 21, 2026
Should you buy a Mac Studio now? M5 Max vs M5 Ultra buying advice | Macworld
pcmag.com
1 article · September 21, 2026
I Tested the New M5 Apple Mac Studio, a Pricey, Quad-Die Beast for Heavy AI Use | PCMag
theverge.com
1 article · September 21, 2026
The M5 Ultra Mac Studio tears through our benchmark tests
tomsguide.com
1 article · September 21, 2026
Mac Studio M5 Ultra review | Tom's Guide

Clarity analysis

How the coverage leans and what the record actually supports. Read the methodology

Perspective Coverage

How much of the coverage speaks to builders, operators and investors. It measures emphasis, not whether the story is right.

Builder36%

For anyone planning to run models on their own hardware, the useful reporting is all in one place. MacStories is the only review with months of prior practice behind it: Federico Viticci made Qwen3.8-Flash-Next the default in Open Minis for iOS and Hermes Agent, and ran a team of DeepSeek V4 Flash agents over 310 documents in an internal app called Desk, 24/7 for 99 days, at $0 in API spend. BGR measured 30 to 40 percent better local AI throughput than the M3 Ultra in LM Studio, roughly 40 tokens a second rising to 55 on a 4-bit MLX build of Qwen 3.8 27B. Against that, Viticci also writes the sentence that undercuts the whole exercise: "You need expensive hardware to run these models, and by the time you've repaid your investment, you could have used the most expensive Anthropic subscription for several years, still saved money, and got better performance in return." He keeps the setup for privacy, for always-on tasks the APIs would have priced out of reach, and because he finds it interesting. The Verge, by contrast, admits it does not normally run local AI and asked its readers for workloads to try.

Operator38%

The configurator is where this story lives. CNET walks the ladder no one else does: the $2,499 base Max gives you 36GB and nothing more until you pay $600 for the 48GB chip, the entry Ultra is another $2,400 on top of that, and a 128GB M5 Max with 1TB of storage lands $100 under the base Ultra. Past 96GB on the Ultra there is no middle tier — the next stop is 256GB for $4,000, which is $25 a gigabyte for the 160 added. Memory is soldered, so the sizing decision is permanent. Storage runs $500 a terabyte, which is exactly the $1,000 separating PCMag's 4TB unit at $12,299 from Engadget's 2TB unit at $11,299, and PCMag's advice is to buy the compute and hang the storage off the Thunderbolt ports. CNET's argument for paying anyway is capacity, not speed: DGX Stations, the coming RTX Spark Windows systems and the Ryzen Halo and Core Ultra compacts all stop at 128GB. It has not tested the Spark machines yet. The 512GB build needs the top chip and does not ship until late October, which Macworld lists as a reason to wait.

Investor26%

Engadget carries the comparison that matters for anyone tracking what memory costs are doing to finished-goods prices: an M3 Ultra with the top chip, 256GB of RAM and 2TB of storage was $7,499 last year, and the equivalent M5 Ultra is $11,299. That is $3,800 more, over 50 percent, which Engadget attributes to RAM prices and Apple's markups. Base prices moved too, the Max from $2,000 to $2,500 and the Ultra from $4,000 to $5,500. CNET calls it a RAMaggedon premium and doubts prices return to pre-datacenter-boom levels. The performance side does not keep pace: Engadget's Ultra costs 1.92 times its $5,899 top-end Max, a $5,400 gap, for margins it measured at 20 to 30 percent on multi-core CPU and GPU and about 10 percent on Geekbench AI. Its verdict is that the leap cannot justify the money short of a hardcore power user, and Macworld tells most professionals to buy the Max.

Reality

Evidence, adoption, hype gap, incentives and confidence, each read independently from the current record on the scale shown beneath it. How these are measured.

Evidence82: 0100
Nine hands-on reviews, one common price sheet
Every dollar figure in this story traces to Apple's configurator, and four publishers arrived at it independently with matching numbers: PCMag and Tom's Guide both at $12,299 as tested, CNET at about $12,300 for the same build, Engadget at $11,299 for the 2TB version. Three publishers ran their own benchmarks and MacStories ran a months-long workload. No reviewer had a tested 512GB machine, since that build does not ship until late October, and CNET has not yet tested the RTX Spark systems it uses as the competitive yardstick.
Adoption41: 0100
One production workload, everything else a review bench
The machine shipped the day after these reviews ran, so real deployment evidence is thin by construction. The exception is substantive: MacStories had already run DeepSeek V4 Flash agents and olmOCR against 310 documents 24/7 for 99 days, and now has Qwen3.8-Flash-Next as the default model in two assistants it uses daily. That is one practitioner's setup, run solo. CNET mentions clustering as a capability without anyone demonstrating it.
Hype gap+18: −100 understated0 aligned+100 overstated
Apple's AI pitch outruns the measured margins
Apple calls the M5 Ultra "a monumental step for AI" and its product page promises frontier-class local models. The measured gains are narrower: Engadget puts the Ultra about 20 to 30 percent ahead of the M3 Ultra and roughly 10 percent ahead of the M5 Max on Geekbench AI, for 1.92 times the price of the top Max. The strongest AI case, MacStories', comes with its author's own concession that the cloud subscription would have cost less for years, and no review prices that subscription or the rented GPU hours it replaces. The gap is real but modest, because the reviews themselves deflate it.
Incentives58: 0100
Apple's review units, a launch-day embargo, affiliate-shaped verdicts
Every machine here came from Apple -- The Verge says so outright -- and every piece published within hours of the same embargo, the day before shipping. These are publications whose reviews carry buying links, and the buying advice is the product: Macworld's piece is entirely about whether to buy now or wait for Black Friday, and Tom's Guide steers readers to a cheaper Mac mini. 9to5Mac's roundup is aggregation of other people's work. That said, several reviewers spent their leverage on criticism rather than praise. That cuts against what incentive pressure would predict.
Confidence76: 0100
Prices are solid, the AI case is one person's
The pricing spine of this story is about as well established as consumer hardware reporting gets: independent configurations that reconcile to the dollar, and a like-for-like generational comparison from Engadget that others corroborate loosely through their own last-year units. The soft part is the reason to buy. The local-agent argument rests on one reviewer's four days of testing plus his earlier 99-day project, the 512GB machine that argument really wants does not exist yet, and the performance numbers vary by publisher from 20 percent to 63 percent depending on the test.

Apple charges $4,000 to move the Mac Studio from 96GB to 256GB of unified memory

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