How to build the AI platform your company needs

A long guide uses DoorDash's internal AI platform as its main example for what companies need once several teams build model-powered features: a single gateway to all models, per-team cost tracking, request logs, output safety checks and automated quality tests. DoorDash reports that moving some tasks to open-weight models cut cost about 20x, and that its support-bot checks cut hallucinations by 90%. These figures come from company talks and could not be independently verified. The guide shows other companies making different choices, such as Bitrise building its own gateway.