GPT-4 style chat completions, GPT-5 style responses flows, Anthropic message APIs, and Google model routes are not interchangeable. The app stores provider-aware settings first, then the future `symbol_full_research` job reads these settings before calling any model.

API keys are not stored in the app database. `API Key Env` must point to an environment variable available inside the `api` and `worker` containers. Put the key in `.env`, then rebuild or restart those containers.