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// RUN — FITS
Can the Apple M1 Ultra 128GB run Routing Transformer (WT-103)?
Yes — here's how fast and up to what context, with real measured numbers.
Routing Transformer (WT-103) on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1732k | 3421.4-4125.8 t/s | ~42.8-51.6 (slow) |
| Q8 | yes | 1734k | 6842.8-8251.6 t/s | ~85.5-103.1 (slow) |
| Q4 | yes | 1734k | 12219.2-14735 t/s | ~152.7-184.2 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to SSD swap and speed drops to the "beyond" figure.
FAQ
Can the Apple M1 Ultra 128GB run Routing Transformer (WT-103)?▶
Yes. At Q4 it generates ~12219.2-14735 tok/s and fits up to 1734k context; beyond that it spills to SSD swap and slows to ~152.7-184.2 tok/s.
How much context fits?▶
At Q4, up to about 1734k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.