---
title: "How to Prevent Prompt Injection: 13 Attacks, Tested"
source: "OpenRouter：Announcements（RSS）"
source_tier: "t1"
url: "https://openrouter.ai/blog/tutorials/prevent-prompt-injection/"
permalink: "https://feed.astralor.com/items/itm_b55c57c63ea4c60796fb6c1d"
published: "2026-10-29T00:00:00.000Z"
score: 55
channel: "ai"
tags: ["Prevent Prompt Injection","Attacks","Tested","Labels","Checking","Armor"]
---

# How to Prevent Prompt Injection: 13 Attacks, Tested

## At a glance

If your app has a model read documents, emails or web pages, anyone who writes in them can try to give it instructions. We ran 25 attacks against four current models with each defense on and off. Labels cut attack email…

## Key points

- We ran prompt injection attacks against four models, with and without each defense.
- Checking tool calls with Armor took attack emails from 73 to 0.

## Full text

We ran prompt injection attacks against four models, with and without each defense. Checking tool calls with Armor took attack emails from 73 to 0.

---

Verify against the original before citing; curated by Astral Feed: https://feed.astralor.com/items/itm_b55c57c63ea4c60796fb6c1d