Set GPT-5.5 Reasoning Effort: When Medium Is Enough

OpenAI's reasoning documentation notes that reasoning effort defaults are model-dependent rather than universal: gpt-5.5 defaults to medium reasoning effort, which serves as the recommended starting point for gpt-5.5's full capabilities before tuning up or down.

API Config: model="gpt-5.5" (uses default medium reasoning effort) Prompt: Synthesize an enterprise data governance architecture from the attached departmental requirements.