Visual understanding
Use either tool to describe an image, extract visible details, critique a design or turn a screenshot into next steps. For sensitive or high-stakes visual interpretation, verify manually.
ChatGPT is often strong at turning visual observations into structured guidance. Gemini can be useful when visual tasks connect to Google products.
Creative prompts
For image generation, the model that writes the better prompt is sometimes more important than the model that creates the image. Ask for composition, lighting, lens, subject, exclusions and variations.
Keep brand-sensitive work controlled and review outputs carefully.
Choosing the tool
Use ChatGPT for broad creative direction and critique. Use Gemini when the image workflow is tied to Google apps or broader multimodal Google features.