Best AI Models for Mac Studio M2 Ultra (2026)

Configure your Mac Studio

All covered Mac Studio generations · estimated speeds

No longer sold by Apple
01

Generation.

02

Chip.

03

Processing power.

The 76-core GPU vs the 60-core: same generation speed (both 800 GB/s), prompt reading about 22% faster.

Qwen3.5 122B-A10B Instruct · estimated speeds · Prompt-speed source

04

Memory.

05

Storage.

Outside the MacAmazon kit · enclosure + drive

Your top 10 models need about 751 GB. 2TB holds them twice over.

  • EnclosureUGREEN USB4 NVMe enclosureUSB4, 40Gb/s · ASM2464PD · aluminum fins · M.2 2280 up to 8TB
    Amazon
  • DriveSamsung 990 PRO 2TBPCIe 4.0 NVMe · M.2 2280 · no heatsink, fits the enclosure
    Amazon
Add both to Amazon cart

40Gb/s USB4 enclosure.

Storage does not change model speed.

Keep Ollama's models on the drive
Name the drive Models, run this, then restart Ollama:launchctl setenv OLLAMA_MODELS "/Volumes/Models/ollama"Ollama FAQ

ModelFit may earn a commission from these links.

06

Model filters.

Use case
Min speed
Must run

Best models for Mac Studio M2 Ultra · 128 GB

20 models · all uses · any speed · estimated speeds

Context
Runtime
Qwen3.5 122B-A10B Instruct 72.0 GB + 0.2 GB KV of 108.8 GB usable 36.6 GB free at 8k
ModelQuantFitRun
1est. 62 tok/s · Runs well122B moe 10BQ4_K_M72.0 GBRuns well34.462
2est. 66 tok/s · Runs well125.09B moe 10BQ4_K_M75.8 GBRuns welln/a66
3est. 78 tok/s · Runs well125B moe 6B93.7 GBRuns well47.978llama-server -hf, via llama.cpp
4est. 37 tok/s · Runs well120B moe 12B86.8 GBRuns well26.137
5est. 94 tok/s · Runs well124B moe 5.1B77.8 GBRuns well35.494llama-server -hf, via llama.cpp
6est. 90 tok/s · Runs well117B moe 5.1BMXFP465.4 GBRuns well28.390
7est. 52 tok/s · Runs well118B moe 8BQ4_K_M96.0 GBRuns well39.252
8est. 112 tok/s · Runs well78.1B moe 3.5B49.8 GBRuns welln/a112llama-server -hf, via llama.cpp
9est. 99 tok/s · Lots of room35B moe 3B38.7 GBLots of room31.899
10est. 88 tok/s · Runs well80B moe 3B84.8 GBRuns well19.688
11est. 45 tok/s · Runs well109B moe 17BQ4_K_M67.0 GBRuns well7.345
12est. 34 tok/s · Lots of room27B16.5 GBLots of room44.034
13est. 99 tok/s · Lots of room30B moe 3B25.4 GBLots of room21.499
14est. 139 tok/s · Lots of room35.95B moe 3BQ4_K_M21.7 GBLots of roomn/a139llama-server -hf, via llama.cpp
15est. 99 tok/s · Lots of room35B moe 3B38.7 GBLots of room30.399
16est. 28 tok/s · Lots of room31B20.0 GBLots of room32.528
17est. 108 tok/s · Lots of room30B moe 3BQ4_K_M19.0 GBLots of room22.6108
18est. 8 tok/s · Runs well123BQ4_K_M74.9 GBRuns welln/a8
19est. 76 tok/s · Lots of room26B moe 4B28.1 GBLots of room29.076
20est. 141 tok/s · Lots of room35BQ4_K_M21.2 GBLots of roomn/a141

Select a row to update the summaryMemory includes 8k contextEstimated speeds · verified run commandsQuality: LLM Stats Score · Data by LLM Stats

See how fast it feels

Qwen3.5 122B-A10B Instruct: ~1.1s to start, then est. 62 tok/s, typical error 10%.

zsh · ollama run qwen3.5:122b-a10best. 62 tok/s

~ $ ollama run qwen3.5:122b-a10b

# Press Send to run the fixed message below.

# fixed message, the same for every model

>>> Summarize these meeting notes in one short paragraph: what was decided, and who does what next.

[meeting-notes.txt]
Weekly sync, support tools team
Attendees: Maya (lead), Jonas, Priya, Tom, Elena
Agenda: local drafting assistant pilot, knowledge base cleanup, customer feedback survey, on-call rota, next steps

1. Local drafting assistant pilot
- Maya recapped the goal: agents draft replies with an assistant that runs on the team's own Macs, so customer emails never leave the building and nothing depends on an outside service being up.
- Jonas ran the pilot for two weeks on four machines. Agents used it for first drafts on roughly a third of tickets. Most drafts needed light edits. A few needed a full rewrite, mostly billing questions where the model guessed at policy instead of saying it did not know.
- Priya said the biggest complaint was the wait before the first word on long tickets. Short tickets felt instant. Tickets with a long email thread pasted in took several seconds before anything appeared, and agents read that as the tool being stuck. Two agents restarted the app because of it.
- Tom suggested trimming the thread to the last three messages before sending it to the model. Elena worried that would drop context the customer refers back to, like an order number from the first email. Agreed to test both on the same set of tickets before choosing.
- Jonas said the speed once the reply starts was fine on every machine. Agents read slower than the model writes, so nobody asked for faster output. The only request was a visible sign that the model is reading, so people stop restarting it.
- Memory: the oldest machine, the one with the least memory, could not keep the model loaded next to the browser and the ticketing app. It swapped and slowed down badly by mid-morning. The other three machines had no issue all day.
- Priya asked whether a larger model would fix the billing guesses. Jonas thought not: the model guesses because the policy text it needs is missing or contradictory, and a bigger model would guess more fluently, not less.
- Decision: keep the current model size for now. Revisit only after the knowledge base cleanup, and only if the edit rate on billing drafts is still high.

2. Knowledge base cleanup
- Elena found about forty articles that contradict each other on refund windows and plan changes. These are the likely source of the billing guesses.
- Priya proposed one owner per section, with a review date on every article so stale pages show up on their own instead of during an angry ticket.
- Agreed: Elena owns billing and refunds, Priya owns accounts and login, Tom owns shipping and returns. Each owner archives duplicates, merges the rest, and flags anything that needs a policy decision from Maya.
- Jonas will add the cleaned articles to the assistant's reference folder once each section is signed off, not before. Mixing old and new versions would make the guessing worse.
- Tom asked for a template for new articles. Elena will share the one billing already uses.

3. Customer feedback survey
- Priya shared the quarterly survey results. Response time scores went up since the last quarter, and the free-text comments mention faster first replies more than once.
- Several comments still complain about being asked for the same order details twice. Elena thinks this happens when a ticket moves between agents and the notes field is left empty.
- Agreed: the handover checklist gets one new line, fill in the notes field before reassigning a ticket. Tom will update the checklist and post it in the team channel.
- Maya wants the next survey to ask one question about reply quality, not only speed, so the team can see whether the assistant drafts change how customers rate answers.

4. On-call rota
- Two people asked to swap weeks in November. Maya approved both swaps.
- Tom raised that weekend coverage gets thin when two people are on leave at the same time. Agreed that leave requests go in the team channel at least two weeks ahead, and Maya checks the rota before approving.
- No change to escalation rules. The escalation doc is still correct.

5. Next steps
- Jonas: run the trimmed thread versus full thread test on fifty past tickets and report the wait before the first word and the edit rate for each.
- Jonas: add a reading indicator to the assistant panel so agents can see the model is working on a long ticket.
- Elena, Priya, Tom: finish their knowledge base sections and send Maya the open policy questions.
- Maya: ask IT whether the oldest machine can get more memory or should be replaced at the next refresh.
- Everyone: log any draft that invents a policy, with the ticket link, in the shared sheet.
- Next sync: same time next week. Maya sends the agenda the day before.

Estimated speed, not a benchmark. Model loading excluded.

Compare configurations

Full comparison
SpecA · yoursBChange
ConfigurationM2 Ultra 76C · 128 GBM2 Ultra 76C · 192 GB
Bandwidth800 GB/s800 GB/ssame
Usable memory108.8 GB (85%)163.2 GB (85%)+54.4 GB
Models at 8k141143+2
Top pickQwen3.5 122B-A10B Instruct
est. 62 tok/s
Qwen3.8-Flash-Next
est. 68 tok/s
Max context256k, max256k, max
B runs 1 models that A cannot at 8k
Qwen3 235B A22B235Best. 25 tok/s

AI model recommendations for Mac Studio M2 Ultra with up to 192GB RAM. Ideal for the largest models. This configuration provides optimal performance for local AI models.

Quick answer

For a Mac Studio M2 Ultra with 128GB RAM, the best local LLM is Qwen3.5 122B-A10B Instruct (est. 62 tok/s, typical error 10%). It loads in ~72GB of unified memory, and 141 of ModelFit's 147 local models fit this device comfortably (ModelFit, 2026).

Sizing rule: a local model needs about 0.6 GB of unified memory per billion parameters at Q4, and ModelFit budgets 85% of this 128GB configuration (70% at 32GB and below, 85% at 128GB and above) so the OS, context, and KV-cache keep headroom. Strong alternatives: Ornith 1.5 122B (~75.8GB) and Qwen3.8-Flash-Next (IQ4_XS) (~93.7GB). On this device Qwen3.5 122B-A10B Instruct runs at est. 62 tok/s, typical error 10%, fast enough for interactive chat. Longer contexts cost extra memory, so a model that fits at 8k context may not fit at 64k. What it will not run: Llama 4 Maverick (400B) needs about 245GB, more than this device's comfortable budget; models that large stay on a cloud API or a higher-memory machine.

$ollama run qwen3.5:122b-a10b
Top pick
Qwen3.5 122B-A10B Instruct
Decode speed
est. 62 tok/s, typical error 10%
Memory needed
~72 GB

Speeds are ModelFit estimates from chip bandwidth and model size, not measured benchmarks. Typical error: the median gap between the ModelFit speed model and measured runs on hardware the model was not fitted on, for this backend and model size.

Cite this page: ModelFit, Best AI Models for Mac Studio M2 Ultra (2026), https://modelfit.io/mac-studio/m2/, updated October 2026, CC BY 4.0.

Apple M2 Ultra performance for AI

With up to 192GB unified memory, the Mac Studio M2 Ultra can load multiple large models simultaneously or run the largest available models. Improved memory bandwidth delivers faster inference across all model sizes.

Based on our analysis, 8 out of 8 recommended models run excellently on this configuration. The sweet spot for Mac Studio with Apple M2 Ultra at 128GB is up to about 125B parameter models with Q4_K_M quantization, which provides the best trade-off between quality and inference speed. Higher-RAM configurations in the Apple M2 Ultra generation, including Pro and Max tiers where available, reach into the 70B+ parameter range.

Device
Mac Studio
Chip
Apple M2 Ultra
Default RAM
128 GB
RAM Options
64, 96, 128, 192 GB

Where to buy for local AI

best configs

ModelFit may earn a commission on purchases through these links, at no extra cost to you.

Config reports

Reported speeds for Mac Studio M2 Ultra, by model, quant and runtime
SourceModeltok/sQuantRuntimeContextNote
Speed testQwen3.8 27BApple M2 Ultra 60-core GPU 128 GB43.0Q4_K_MOllama-1 run

Speed test: runs submitted through the ModelFit speed test tool, one median per machine.

Share your config

Every report is reviewed before it appears. No email or account needed.

0/280
FAQ

Frequently asked questions

What is the best AI model for Mac Studio with Apple M2 Ultra?

With 128GB RAM and the Apple M2 Ultra chip, we recommend Qwen3.5 122B-A10B Instruct for the best balance of speed and quality, handling models up to about 125B parameters at this RAM. Higher-RAM Mac Studio configurations in the Apple M2 Ultra generation, including Pro and Max tiers where available, reach into the 70B+ parameter range.

How much RAM do I need for AI on Mac Studio Apple M2 Ultra?

Mac Studio with Apple M2 Ultra supports 64, 96, 128, 192GB configurations. For most AI workloads, 128GB provides good headroom. A 7B model typically needs 4-5GB of free RAM, while 14B models need 8-10GB.

How fast is Apple M2 Ultra for running local AI models?

With optimized models, the Apple M2 Ultra on Mac Studio achieves est. 62 tok/s, typical error 10%. With up to 192GB unified memory, the Mac Studio M2 Ultra can load multiple large models simultaneously or run the largest available models. Improved memory bandwidth delivers faster inference across all model sizes. (Speeds are ModelFit estimates, not measured benchmarks.)

Can I run Ollama on Mac Studio Apple M2 Ultra?

Yes, Ollama runs natively on Apple Silicon including Apple M2 Ultra. You can install it in minutes and run models like Qwen3.5 122B-A10B Instruct locally. Our wizard recommends the best models based on your exact Apple M2 Ultra configuration and available RAM.

Related guides

Other Mac Studio configurations

Real-world calibration

Have this hardware? Share a measured run.

Time a model that fits your machine with Ollama, using the same prompts as every other run. The CLI shows your result and asks before it sends anything; your machine then joins the speed test leaderboard. It does not change the quality benchmark.