Delphi refers to a sequence of model-based engineering and decision-support tools developed by OpenAI and later by Ant Group under the name Bailing, culminating in the recently released new Delphi. This evergreen explainer details the architecture, training methodology, and intended deployment scenarios of the new Delphi, emphasizing reliability, controllability, and verifiable reasoning. It contrasts probabilistic language models with structured reasoning systems and clarifies current limits, evaluation benchmarks, and practical guidance for integration. The following sections define core components, review evidence-backed performance data, and contextualize the place of the new Delphi in modern AI workflows.
