A practical walkthrough for using OpenAI's GPT Image API (gpt-image-1.5) to generate and edit images via curl commands. Covers setting up an API key, generating images from text prompts, decoding base64 responses, editing existing images, and tips on writing effective prompts. Includes real outputs from live API calls and highlights common mistakes like using outdated model names or vague prompts.
Table of contents
What this GPT Image guide coversGet your API key readyGenerate your first GPT Image outputPrompt detail matters more than people expectTry a second prompt that pushes text renderingEdit an existing imageBuild something useful: a blog or landing-page artwork workflowWhen GPT Image is the right toolCommon mistakes with GPT Image2 Impressions