Bounded ASCII model name as a provider reports it - gpt-5-codex, claude-sonnet-4-5. Printable ASCII without whitespace, at most 128 bytes. Retained metadata, never an event attribute (§17.3).
API reference sections
Schema
DelegateModelName
Type string
Shape
Type DelegateModelName
"string"The contract has no example values, so example bodies are generated from each schema: every field is shown with a placeholder of its type.
Generated from contract version 1. Last updated .
