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Apple M5 Ultra 256GB

Perfect for running Llama 4 405B (Q6), GPT-OSS 120B (Q4), Multiple 70B models and FLUX 2, SD 3.5 Large locally.

Apple
VRAM

256GB Unified Memory

Bandwidth

1,200+ GB/s

Power

Efficient

Price

$9,999-14,999

Best AI Models for Apple M5 Ultra 256GB

Advantages

  • Massive 256GB memory
  • Run multiple models
  • Excellent efficiency
  • Ultra performance

Limitations

  • Extremely expensive
  • Mac only
  • New generation
  • Overkill for almost all

Alternatives to Apple M5 Ultra 256GB

M5 Ultra 192GB
Alternative
RTX 5090 x4-6
Alternative
Cloud GPUs
Alternative

Where to Buy

Apple
Official Apple Store

Best Use Cases

405B models (Q6)
Enterprise
Research
Multi-model

Specifications

VRAM:256GB Unified Memory
CUDA Cores:N/A (GPU Cores)
Memory Bandwidth:1,200+ GB/s
Power:Efficient
Release Date:2026-03

Compare GPUs

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