OpenAI has been steadily expanding its guidance on prompt engineering, the art of talking to AI models in ways that actually produce useful results. The company’s latest documentation, updated as recently as June 2026, lays out a comprehensive set of best practices for interacting with its API and ChatGPT models, covering everything from using the latest model versions to structuring context and iteratively refining outputs.
What OpenAI actually recommends
The core of OpenAI’s guidance centers on a few pillars that sound simple but are deceptively hard to execute well. First: always use the latest model. Newer versions tend to handle nuance, follow instructions more reliably, and produce fewer hallucinations.
Second, and arguably more important: write clear, specific instructions. OpenAI’s documentation emphasizes that vague prompts produce vague answers. Specifying the desired output format, the role the model should adopt, and the constraints it should follow dramatically improves response quality.
Third, structure your context carefully. Breaking information into labeled sections, using delimiters, and providing examples of desired outputs all help the model understand what you’re actually asking for.
