Ironically, local models are much more efficient when running multiple parallel agents, provided that KV storage requirements are not excessive (not an issue with DeepSeek 4.1 Flash). It does not make any individual agent faster, but it does raise overall throughput quite a bit. The limit is then set by compute constraints rather than memory bandwidth, so something like DGX Spark or AMD Strix/Gorgon Halo can be expected to do better than the Apple-based alternative.