M5 Ultra vs. M3 Ultra: Local LLM Performance Compared

I compare the M5 Ultra and M3 Ultra on local LLM workloads, focusing on prompt processing and token generation. The DeepSeek V4 Flash test also shows how prompt length affects the performance difference.

- Local LLM comparison: prompt processing and token generation
- How results vary with prompt length, from short prompts to longer inputs
- Scope: these two performance measures, rather than a broader system or workload comparison

If you use local LLMs for coding agents or other professional tasks, this comparison can help you assess the upgrade against your typical prompt lengths. Consider your workload before deciding whether the performance gains matter to you.