Can Mac Studio M3 Ultra 512 GB run LFM2.5 24B-A2B?

512 GB unified · 819 GB/s memory bandwidth · LFM2.5 24B-A2B has 24B parameters (2B active per token).

Short answer

Yes, excellent for chat and comfortable or better for every workload we test.

Best quantization for chat: Q4_K_M (14 GB of weights) on LM Studio. Generation: 190–260 tok/s, leaving about 487 GB free for your other apps.

How it rates for each workload

Same model and machine, different jobs. Agents and long documents send far bigger prompts than chat, so they need much more speed and memory.

Workload	Verdict	Quant	Generation	First reply	Context
Chatwith Open WebUI	Excellent	Q4_K_M	190–260 tok/s	under 1 s	8K	Details
Coding questionswith Continue	Excellent	Q8_0	110–150 tok/s	≈1 s	16K	Details
Coding in a repositorywith Aider	Comfortable	Q8_0	100–140 tok/s	≈3 s	32K	Details
Agentic codingwith OpenCode	Comfortable	Q8_0	95–130 tok/s	≈4 s	32K	Details
Long documents (64K)with Open WebUI	Excellent	Q8_0	75–100 tok/s	≈15 s	64K	Details

Speeds are estimates calibrated against measured benchmarks on similar hardware. “First reply” is the time to read the workload’s opening prompt. How we calculate

Other models for Mac Studio M3 Ultra 512 GB

The best-rated models for chat on this machine.

Everything Mac Studio M3 Ultra 512 GB can run

Cheapest machines for LFM2.5 24B-A2B

Hardware rated comfortable or better for chat, lowest price first.

Same chip, other memory: 96 GB, 256 GB

Different tool, context size or workload?

These pages use typical settings. The full check models your exact setup.

Check my exact setup