Apple discontinued the 512 GB unified-memory configuration of the Mac Studio M3 Ultra. We secured our machines before it was pulled, and rent out dedicated remote access — you connect over Tailscale, nothing is shipped.
Hardware specifications
Source: Apple — Mac Studio (2025) technical specifications
- Chip
- Apple M3 Ultra
- CPU
- 32 cores
- GPU
- 80 cores
- Neural Engine
- 32 cores
- Unified memory
- 512 GB
- Memory bandwidth
- 819 GB/s
- Storage
- 4 TB SSD
- Thunderbolt
- Thunderbolt 5 × 6 (4 rear + 2 front)
- USB-A
- USB 3 × 2 (up to 5 Gb/s)
- HDMI
- HDMI 2.1 × 1
- Ethernet
- 10 Gb Ethernet
- Wi-Fi
- Wi-Fi 6E (802.11ax)
- Bluetooth
- Bluetooth 5.3
What 512 GB actually runs
With 512 GB of unified memory at 819 GB/s, the weights of frontier open-weight models stay fully resident — no sharding across GPUs, no offloading to disk. Ollama, llama.cpp, and MLX work out of the box on macOS.
- GLM-5.2 (744B MoE)
- 4-bit quant (~390 GB) fits entirely in memory — MIT license, 1M context
- DeepSeek-V3 / R1 (671B MoE)
- 4-bit quant (~380 GB) fits with no offloading to disk
- Kimi K2.7 Code (1T MoE)
- Runs at 2-bit quantization (~325 GB) with room for context
- DeepSeek V4-Flash (284B MoE)
- 4-bit (~145 GB) — huge headroom for context or a second model
- Qwen 3.6 / 70B-class
- Several models resident at once — hot-swap without reloading
Throughput depends on the model and quantization. Rent it and run your own benchmark — that is exactly what the short plans are for.
The rental environment
- Connection
- Tailscale (WireGuard) — SSH / VNC / macOS Screen Sharing
- Machine type
- Dedicated bare metal — not shared, not virtualized
- Uptime
- Runs 24/7 for your whole rental period
- Your account
- Your own macOS administrator user
- Security
- No open inbound ports; end-to-end encrypted tunnel only
- Network
- 1 Gbps fiber, hosted in Kobe, Japan
- Start
- Access page is provisioned automatically right after checkout
Pricing — one-time payment, no subscription
- 7 days
- $499 (~$71/day)
- 14 days
- $799 (~$57/day)
Pay once with Stripe Checkout (cards, Apple Pay, Google Pay). Access starts right after payment and simply ends when the period is over — nothing renews, nothing to cancel.
What people rent it for
Frontier open-weight models
Run the current open-weight frontier (GLM-5.2, Kimi K2.7, DeepSeek R1 / V4-Flash) locally over Ollama, llama.cpp, or MLX — no API rate limits, no per-token billing.
AI agents, running 24/7
Keep Claude Code, Codex, or autonomous agents running around the clock on a machine that is not your laptop. Multiple models stay resident.
Try before you buy
A used 512 GB M3 Ultra costs well over $7,000 — when you can find one. Verify your workload actually fits and performs for $499 before committing.
Research & prototyping
Benchmark quantizations, test fine-tuned weights, or run evaluations on hardware you could not otherwise access — for exactly as long as you need.
Rent the 512 GB machine
7 days from $499. Checkout to SSH in about 10 minutes.
Running 7B–70B-class models? The 96 GB configuration starts at $149 for 7 days. 日本語版は ai-kizai.jp へ。