What model are you running with 64GB of VRAM (equivalent)? I doubt most users are doing that. Looking at their documentation, the default path for openclaw seems to be a 3P API for the model.
On a 64 GB Apple silicon Mac mini you can natively host mid sized and some larger quantised local models .. using Ollama.
For example:
Qwen3-Coder (32B), GLM-4.7 (or GLM-4 Variants), Devstral-24B / Mistral Large (Quantized)