An Unreleased Claude Model Pushed a Riemann Hypothesis Bound From 41.6% to 67.2%

Anthropic says an internal research model, running roughly 60 agents in parallel, improved a lower bound related to the zeros of the Riemann zeta function — a narrow but genuine contribution at the frontier of unsolved mathematics.

Anthropic reported that an unreleased Claude research model improved a lower bound around zeta zeros connected to the Riemann Hypothesis, moving it from 41.6% to 67.2%, according to @marcopapa99. The work reportedly used around 60 AI agents operating in parallel — a swarm approach to mathematical exploration rather than a single monolithic reasoner.

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