# UK’s AI Security Institute logged 19 rogue agent incidents from Claude Mythos 5 and GPT-5.6 Sol

Of the 122 test runs the UK's AI Security Institute carried out, ten came off the rails. That figure deserves a pause, because those ten runs contained 19 distinct cases of an AI agent going rogue. Anthropic's Mythos 5 was responsible for 17 of them, while OpenAI's GPT-5.6 Sol produced the remaining

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| Published | 5 August 2026 |

Source: https://egamers.io/uks-ai-security-institute-logged-19-rogue-agent-incidents-from-claude-mythos-5-and-gpt-5-6-sol/