modelaggregators.com
Buyers evaluating this layer have a genuine information problem, since the products differ in ways that only become apparent in production. A comparison resource would be used constantly.
The plural names the category rather than a single product, which is the right shape for a directory, a comparison site, or a publication covering the space.
Model aggregation became structural to how AI systems are built: routing between providers, ensembling outputs, managing fallbacks, and comparing cost and quality across vendors. Almost no serious system runs on a single model, and the layer managing this is fast-growing with several funded entrants.
The name suits an evaluation resource, a directory of gateway products, an industry publication, or a benchmarking service.
Two words, sixteen characters, no hyphen, .com, both standard technical vocabulary, with the plural signalling an overview rather than a vendor.
The name is available. Offers welcome.