xAIGrok image detector

Images made with Grok are usually shared on X, which strips file metadata on upload.

AI image detector

ChatGPT, Gemini, Midjourney, Flux and more

What it checks

Content CredentialsC2PA and IPTC labels
Generator fingerprintsSettings AI tools save
Camera dataMake, model and exposure
Visual inspectionHands, text, light, texture

Private. The file is checked on your device.

Drop an image to get a verdict

It names the AI that made it when the file says so, and checks the pixels when it does not.

AI

ChatGPT

Content Credentials in the file

AI

Stable Diffusion

The full prompt, read back

AI

Gemini

IPTC label in the metadata

Real

Camera photo

Make, model and exposure

  • Free, no sign-up
  • Images and video
  • Names the AI that made it
  • Private: files stay on your device

Open the full detector

In short

Images made with Grok are usually shared on X, which strips file metadata on upload. Drop an image and Gireta reads any labels that survived, then inspects the picture closely for the tells of AI generation: hands, text, light, reflections and texture.

How the check works

  1. 1

    Content Credentials and IPTC

    We read the file's C2PA manifest and XMP metadata for the IPTC digital source type. “Trained algorithmic media” means a generator made it; “composite with trained algorithmic media” means AI edited a photo.

  2. 2

    Generator fingerprints

    Stable Diffusion, ComfyUI, InvokeAI and NovelAI write their settings into PNG files, and many tools name themselves in the software field. We read every text chunk and EXIF field.

  3. 3

    Camera data

    Real cameras record make, model, lens and exposure settings. We read them all and weigh them with everything else.

  4. 4

    Close visual inspection

    A vision model inspects the image for the tells generators leave: hands, teeth, text, reflections, repeated backgrounds and over-smooth skin.

What each AI image generator leaves in its files

Most of the big generators now label their images. The label survives as long as nobody screenshots, crops or re-saves the file.

GeneratorWhat it writes into the imageWhat Gireta reads
ChatGPT and GPT Image (OpenAI)A signed C2PA manifest naming OpenAIThe manifest and its source type
Gemini and Nano Banana (Google)A SynthID watermark in the pixels, plus C2PA and the IPTC source typeC2PA and IPTC; SynthID needs Google's own detector
Adobe FireflyC2PA Content Credentials, since launchThe manifest and its source type
Microsoft Designer and Bing Image CreatorC2PA Content CredentialsThe manifest
MidjourneyNo C2PA; committed to the IPTC source type in 2023IPTC fields and prompt text when present, then the visual check
Stable Diffusion (Automatic1111, Forge, Fooocus)A PNG text chunk called parameters: prompt, seed, sampler, stepsThe whole block, word for word
ComfyUIThe prompt and workflow node graph as JSON in the PNGThe workflow
Flux, Grok and most othersUsually nothingThe visual check and camera data

Screenshots, social apps and most image editors strip all of this. A missing label does not mean a real photo.

What the verdict means

VerdictWhat decided it
AI-generatedThe file's own provenance or generator settings say AI made it. This is as certain as it gets.
AI-editedProvenance says a photo or image was changed with generative AI.
Camera originalContent Credentials record a camera capture.
Likely AINo provenance, but the visual check and other clues lean towards AI.
Likely a real photoNo provenance, but camera data and the visual check lean towards a photo.
Mixed signalsThe evidence points both ways. Check the original file or run a reverse image search.

More ways to check

Images

AI image detectorCheck if an image is AI-generated, free. Reads Content Credentials, IPTC labels and generator settings from ChatGPT, Gemini, Midjourney and Stable Diffusion, then inspects the pixels.How to tell if an image is AI generatedTen ways to tell if an image is AI-generated, from the strongest evidence (Content Credentials, metadata, SynthID) to the visual tells in hands, text and light.Content Credentials (C2PA) checkerCheck an image's Content Credentials (C2PA) and IPTC source type online, free. See if it was made or edited with AI, and which tool made it.AI image metadata checkerSee an image's hidden metadata: the Stable Diffusion or ComfyUI prompt, EXIF camera data, XMP and C2PA. Free, in your browser, with error level analysis.ChatGPT image detectorCheck if an image was made with ChatGPT, GPT Image or DALL·E. Reads OpenAI's Content Credentials and inspects the image, free and private.Gemini and Nano Banana image detectorCheck if an image was made with Google Gemini, Nano Banana or Imagen. Reads C2PA and IPTC labels in your browser and explains SynthID.Midjourney detectorCheck if an image was made with Midjourney. Reads IPTC labels and prompt text, then inspects the image for Midjourney's look. Free and private.Stable Diffusion detectorCheck if an image was made with Stable Diffusion or SDXL and read its prompt, seed, sampler and model from the file. Works with Automatic1111, Forge, Fooocus and ComfyUI.Flux image detectorCheck if an image was made with Flux. Reads ComfyUI and Forge workflows from the file, names the model, and inspects the image. Free and private.

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Questions

How can I tell if an image on X was made with Grok?

Save the image and drop it into Gireta. Uploads to X lose their metadata, so the result comes from the visual inspection, which looks for the tells all generators leave.

Do you keep my image?

No. The file is read in your browser and never uploaded. For the visual check, a small preview (at most 1024 pixels wide) is sent, inspected and discarded.

Can it tell me which AI made the image?

Yes. It reads the signature AI tools leave in their files and names ChatGPT, Gemini, Adobe Firefly, Midjourney, Stable Diffusion, ComfyUI, Sora, Veo and more.

Sources

Last updated October 19, 2026.