Interaction / Background Model Split

Dual-model architecture: time-aware interaction model stays present; async background model handles deep reasoning/tools; rich-context-package delegation; "reasoning-model planning at non-thinking latency"; Inkling (July 2026) is the named background half — and OpenAI's GPT-Live (July 2026) ships the same split in production, delegating from a full-duplex voice model to GPT-5.5 over a pre-warmed prefilled session