Anthropic Air-Gaps Internal Evaluations from the Internet

Anthropic is physically isolating its internal model evaluation pipelines from internet access, a significant operational security move aimed at preventing external interference with safety assessments. The decision reflects growing concern that evaluation infrastructure itself can become an attack surface — a model or external actor could theoretically influence test results if evaluations are network-accessible. For developers building on Claude or using Anthropic's APIs, this signals that Anthropic is treating its evaluation stack as safety-critical infrastructure deserving the same threat modeling as production systems. This move also sets a precedent that other frontier labs may follow, potentially reshaping how the industry approaches eval integrity. Teams building their own LLM evaluation pipelines should consider what network isolation and access controls are appropriate for their own testing environments.