Can it generate a logo that works well at tiny sizes — like a 16x16 favicon?
Favicon viability is one of its design criteria. It tests each concept mentally at 16x16 pixels and flags when a design collapses at that size — when thin lines vanish, when intricate details become noise, when text becomes illegible. The GPT will recommend a simplified 'favicon variant' of your logo that preserves the core recognition element (often just the mark without the wordmark) at tiny sizes. A logo that only works above 200px is half a logo, and the GPT treats small-size legibility as a requirement, not a nice-to-have.