Anthropic dominates Cisco’s new AI security rankings
Cisco just released its free LLM Security Leaderboard, testing how top AI models hold up against adversarial attacks. Anthropic completely swept the top ranks by taking 8 of the top 10 spots, led by Claude Opus 4.5 at No. 1, while OpenAI’s GPT-5.2 finished 7th. Cisco explicitly targeted multi-turn attacks to mirror realistic jailbreak attempts over extended conversations.