Users are hitting a frustrating glitch in ChatGPT's image generation: outputs are rendering with a tiled grid or pixelated pattern overlaid across the image, seemingly at random. The issue appears to be a fallback behavior baked into the model's image pipeline, where something in the generation process breaks down and the result looks more like a corrupted texture than an intentional image.
The grid artifact shows up across different prompt types and styles, which rules out a specific prompt trigger. Regenerating the same prompt sometimes fixes it, sometimes doesn't. No fix is confirmed on OpenAI's end as of April 29, 2026, and the company hasn't publicly acknowledged the issue.
For daily users relying on ChatGPT for quick image creation - social graphics, concept visuals, mockups - this kind of unreliable output is a real workflow disruption. If you're seeing this, the current workaround is to retry the generation or start a new conversation thread. Dedicated image tools tend to be more consistent when ChatGPT's image pipeline is acting up.