Can Mac Studio M5 Ultra 256 GB run Kolibri-1 (78B-A3.5B)?
256 GB unified · 1228 GB/s memory bandwidth · Kolibri-1 (78B-A3.5B) has 78.1B parameters (3.46B active per token).
Short answer
Yes, excellent for chat and acceptable or better for every workload we test.
Best quantization for chat: FP8 (73 GB of weights) on LM Studio. Generation: 100–170 tok/s, leaving about 172 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 | FP8 | 100–170 tok/s | under 1 s | 8K | Details |
| Coding questionswith Continue | Excellent | FP8 | 100–170 tok/s | under 1 s | 16K | Details |
| Coding in a repositorywith Aider | Acceptable | FP8 | 95–160 tok/s | ≈2 s | 32K | Details |
| Agentic codingwith OpenCode | Acceptable | FP8 | 90–150 tok/s | ≈2 s | 32K | Details |
| Long documents (64K)with Open WebUI | Excellent | FP8 | 80–130 tok/s | ≈5 s | 64K | Details |
Speeds are bandwidth-based estimates; no direct benchmark exists for this pair. “First reply” is the time to read the workload’s opening prompt. How we calculate
Other models for Mac Studio M5 Ultra 256 GB
The best-rated models for chat on this machine.
- gpt-oss-120b120–210 tok/sExcellent
- Qwen3.6 35B-A3B140–240 tok/sExcellent
- Qwen3-Next 80B-A3B Instruct140–230 tok/sExcellent
- Gemma 4 26B-A4B110–190 tok/sExcellent
- Qwen3.5 35B-A3B140–240 tok/sExcellent
- LFM2.5 24B-A2B280–460 tok/sExcellent
Cheapest machines for Kolibri-1 (78B-A3.5B)
Hardware rated comfortable or better for chat, lowest price first.
- Desktop PC · Ryzen 9 9950X (no GPU) · 64 GB DDR5$1,400 · 13–20 tok/sComfortable
- Ryzen AI Max+ 395 mini PC / Framework Desktop · 64 GB$1,600 · 65–90 tok/sExcellent
- Ryzen AI Max+ 395 mini PC / Framework Desktop · 128 GB$2,000 · 40–55 tok/sExcellent
- Mac mini M4 Pro 64 GB$2,199 · 60–80 tok/sExcellent
- Mac Studio M1 Max 64 GB$2,399 · 80–110 tok/sExcellent
- Mac mini M5 Pro 64 GB$2,499 · 55–90 tok/sExcellent
Different tool, context size or workload?
These pages use typical settings. The full check models your exact setup.