OpenAI's GPT-5.4 Pro reportedly solves a longstanding open Erdős math problem in under two hours

THE DECODER / 4/15/2026

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Key Points

  • The report says OpenAI’s GPT-5.4 Pro solved a longstanding open Erdős mathematics problem in about 80 minutes.
  • Terence Tao reportedly described the result as a meaningful contribution to mathematics, highlighting the significance of the AI-aided breakthrough.
  • The article frames the achievement as evidence that advanced LLMs can tackle hard, real-world mathematical tasks rather than only generate informal explanations.
  • The speed of the solution is emphasized, suggesting practical progress toward automated or AI-assisted theorem discovery workflows.

GPT-5.4 Pro solves an open Erdős problem in 80 minutes. Terence Tao calls it a meaningful contribution to mathematics.

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