According to Anthropic (@AnthropicAI), deploying advanced AI classifiers reduced the jailbreak success rate for their Claude model from 86% to 4.4%. However, the solution incurred high operational costs and increased the rate at which the model refused benign user requests. Despite the classifier improvements, Anthropic reports the system remains susceptible to two specific attack types, indicating ongoing vulnerabilities in AI safety measures. These findings highlight the trade-offs between robust AI security and cost-effectiveness, as well as the need for further innovation to balance safety, usability, and scalability for enterprise AI deployments (Source: AnthropicAI Twitter, Jan 9, 2026).