How DALL-E handles system prompts differently
DALL-E does not have a standalone persistent system prompt field in the standard interface, but your ChatGPT Custom Instructions directly influence DALL-E 3 outputs when you generate images through ChatGPT. DALL-E also fundamentally uses natural language rather than the parameter syntax Midjourney requires, making it more accessible but requiring different prompting techniques.
How to write effective DALL-E prompts
Use natural language, not keywords
DALL-E is trained on descriptive text. "A photorealistic portrait of a woman in her 30s, soft natural window light from the left, shallow depth of field, neutral background" outperforms a keyword list in DALL-E. Descriptive sentences with specific technical details produce more consistent results.
Use negative instructions reliably
DALL-E follows "Do not include:" instructions more reliably than most image generation models. End prompts with specific exclusions: "Do not include text, watermarks, borders, or logos."
Leverage ChatGPT's rewriting
Because ChatGPT rewrites your image requests before sending to DALL-E, you can use conversational language. ChatGPT will expand it using your Custom Instructions context into a full DALL-E prompt.
System prompt vs master prompt vs user prompt for DALL-E
| Layer | DALL-E equivalent | What it controls | Changes |
|---|---|---|---|
| System prompt | ChatGPT Custom Instructions (image section) or API system parameter | Default style, orientation, and avoidance rules | Monthly or per project |
| Master prompt | Base style template appended to each prompt | Visual identity in natural language | Rarely |
| User prompt | Subject description for each generation | What is in the image | Every generation |
Common questions
How is DALL-E different from Midjourney?
DALL-E uses natural language descriptions and follows negative instructions very reliably. Midjourney uses comma-separated keywords and parameter flags and tends to produce more stylistically artistic outputs by default. See our Midjourney guide for a direct comparison.
Can I generate consistent characters across multiple images in DALL-E?
DALL-E 3 does not have a native character reference feature like Midjourney's --cref. The best approach is very detailed physical descriptions in all subsequent prompts featuring that character.
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