Multi-turn jailbreak rates across 15 frontier models (Grok 88%, Claude 12%)
A recent evaluation of 15 frontier large language models (LLMs) reveals that single-turn attack success rates are not reliable indicators of multi-turn vulnerabilities. The study found multi-turn attack success rates ranging from 7.89% to 88.30%, indicating significant risks across all models tested. This highlights the need for more comprehensive evaluation methods that account for iterative adversarial behavior.
- ▪The evaluation included flagship models from OpenAI, Anthropic, Google, Amazon, and xAI.
- ▪Multi-turn attack success rates were significantly higher than single-turn rates, with some models showing increases of up to 9 times.
- ▪Every model tested exhibited non-trivial multi-turn attack success rates, indicating vulnerabilities under iterative pressure.
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| Original publisher | Cisco Blogs |
| Canonical URL | https://blogs.cisco.com/ai/proprietary-problems |
| Publication time | Wed, 27 May 2026 22:23:18 +0000 |
| Retrieval time | 2026-05-27T22:38:06.181Z |
| Last seen | 2026-05-27T22:38:06.181Z |
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May 27, 2026 Leave a Comment Artificial Intelligence - AI Proprietary Problems: No Frontier Model Is Multi-Turn Immune6 min read Nicholas Conley, Amy Chang The dominant safety benchmarks for frontier large language models (LLMs) share a structural assumption: that a single prompt and a single model response are enough to characterize how a model behaves under adversarial attack. These benchmarks inform model cards, safety reports, and procurement decisions across the industry, but they all only measure one narrow slice of attacker behavior.
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