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Leonardo.ai Prompt Blocked: Content Moderation Filter

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Ongoing Web, API Updated November 14, 2026Based on 2 user reportsHow we research

Quick answer

Leonardo.ai blocks prompts whose word combinations might produce content banned by its Terms. Reword the prompt; free accounts are filtered more strictly.

Most likely fix: Reword and retry

How to fix it

Try these in order — the most common fix is first.

  1. 1. Reword and retry

    1. Edit the prompt to remove depictions the Terms of Service restrict
    2. Try different wording rather than resubmitting the same prompt
    Did this fix it?

  2. 2. Free vs paid

    1. Free accounts face stricter filters; test prompts on the lowest paid tier to compare (the FAQ does not detail the difference)
    Did this fix it?

  3. 3. Hidden NSFW images

    1. Click the flagged image to reveal it
    2. To show them in feeds, enable it under Profile in Settings (18 or older)
    Did this fix it?

  4. 4. API users

    1. The API returns 403 with content moderation filter: naked or Your prompt appears to contain inappropriate content; revise the prompt
    Did this fix it?

Symptoms

Generation is refused, you see a moderation message such as Free users are subject to stricter filtering, or the API returns 403 with Your prompt appears to contain inappropriate content.

Why it happens

  • Prompt-level filters trigger on certain word combinations
  • Free accounts get stricter filtering
  • Output that may be NSFW is flagged and hidden
  • Prompt may depict pornography, violence or other restricted content

This guide also covers

  • leonardo ai prompt blocked
  • leonardo ai content moderation filter
  • leonardo ai nsfw filter
  • leonardo ai free users are subject to stricter filtering

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