Anthropic has implemented an anti-distillation measure called "preserved thinking" to prevent other AI labs from training their models on Claude's reasoning. This measure, which began enforcement for new API accounts on August 31, 2026, restricts the ability to edit conversation history, potentially impacting multi-turn AI agent integrations. Anthropic reports this defense, along with two others, has reduced data harvesting by 90-99%, though it may introduce friction for developers and paying customers. AI
IMPACT Developers integrating Claude may need to update their AI agent architectures to comply with new restrictions on message history editing.
RANK_REASON The article discusses a change in API behavior and its impact on developers, rather than a new model release or core research.
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