Glossary (gateway & billing)

Term	Short definition
Virtual Key	Customer credential mapping budgets & catalog entitlements
SKU / product	Sellable unit of capability + pricing; may map to many upstream configs
`model`	Request parameter; catalog is source of truth
Usage records	Metering facts for billing & reconciliation
Upstream / supplier	Actual compute provider; topology usually not customer-visible
OpenAI-compatible	HTTP shape aligns with OpenAI APIs subset—not full feature parity

See also