Glossary · Model mechanics
Prompt injection
Also said as
injection attackhidden instructions
Prompt injection is trick wording — often hidden in material the AI reads — that makes it ignore its instructions and do what the attacker wants instead.
Why it matters to your business
It matters most when the AI can act rather than just talk: a tricked chatbot gives bad advice, while a tricked agent sends the email, books the appointment, or moves the money.
The catch · what vendors don't say
No vendor has fully solved it, and 2026 research found that text watermarking can quietly change how models respond under injection — the safety you tested is not always the safety you get.
See it in action
