← CanIRunLocal · All hardware · All models

Can a M3 Max (40c GPU) 128GB run Laya 421M (Convai, decision)?

Yes. Laya 421M (Convai, decision) fits in fast memory on M3 Max (40c GPU) 128GB at BF16 (1.5 GB needed, 96.0 GB usable), about 381 tok/s (estimate).

Hardware: M3 Max (40c GPU) 128GB · Model: Laya 421M (Convai, decision)

M3 Max (40c GPU) 128GB has 128 GB of unified memory and 400 GB/s of memory bandwidth. The checker leaves macOS a share of unified memory, so Ollama can use 96.0 GB. Laya 421M (Convai, decision) (0.421B, Convai Innovations) at BF16 is a 0.84 GB download and needs 1.5 GB with headroom for about 8k tokens.

Best quantBF16
Download size0.84 GB
Memory needed1.5 GB
Usable fast memory96.0 GB
Fitfits in fast memory
Estimated speed~381 tok/s (estimate)
Commandollama run laya:421m-english-bf16
Open M3 Max (40c GPU) 128GB in the checker

Estimates, not benchmarks. Model sizes are ollama.com download sizes; memory needed adds headroom for ~8k tokens of context; speeds are rough figures from memory bandwidth. Data updated 2026-10-23.

A project by OnDevice Labs · llms.txt