Gandalf — Agent Breaker
ExternalGandalf is a free, gamified red teaming platform by Lakera that challenges players to master prompt injection and hack AI agents across 8 escalating levels. In modes like Agent Breaker, users simulate real-world attacks such as tool abuse and data exfiltration on 10 realistic agent apps, climbing global leaderboards while generating millions of attack data points that power Lakera's GenAI security products. Perfect for AI developers, security professionals, and red teamers seeking engaging, hands-on training to bolster defenses against AI vulnerabilities.
Description
Gandalf is a free, gamified red teaming platform by Lakera that challenges players to master prompt injection and hack AI agents across 8 escalating levels. In modes like Agent Breaker, users simulate real-world attacks such as tool abuse and data exfiltration on 10 realistic agent apps, climbing global leaderboards while generating millions of attack data points that power Lakera's GenAI security products. Perfect for AI developers, security professionals, and red teamers seeking engaging, hands-on training to bolster defenses against AI vulnerabilities.
Key capabilities
- Gamified prompt injection challenges with 8 escalating defense levels
- Agent Breaker mode hacking 10 realistic AI agent apps via tool abuse and data exfiltration
- Generates over 80 million attack data points for AI security products
- Global leaderboard tracking top scores
Core use cases
- 1.Hands-on red teaming for prompt injection vulnerabilities
- 2.Simulating production AI agent attacks in a fun format
- 3.Building hacker mindset and practical GenAI security skills
Is Gandalf — Agent Breaker Right for You?
Best for
- AI developers and security professionals for hands-on practice
- Red teamers and cybersecurity experts simulating real attacks
Not ideal for
- Complete beginners lacking prompt engineering knowledge
- Users needing full production security tools over education
Standout features
- Password reveal challenges with upgrading defenses
- Community Slack and global leaderboards
- Free access with addictive gameplay
- Integration with Lakera Guard security
User Feedback Highlights
Most Praised
- Highly engaging and educational for AI vulnerabilities
- Fun and addictive with realistic scenarios
- Builds practical red teaming skills
- Strong community competition via leaderboards
Common Complaints
- Non-deterministic responses cause inconsistency and frustration
- Past security incident exposed user prompts publicly
- Inconsistent defenses and variable difficulty