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The DecoderJuly 11, 2026· 1 min read

OpenAI's GPT-5.6 Sol Ultra reportedly solves a 50-year-old math problem in under an hour

OpenAI's GPT-5.6 Sol Ultra has reportedly solved a 50-year-old math problem, the Cycle Double Cover Conjecture, in under an hour. This achievement has sparked questions about the nature of AI's problem-solving abilities.

What happened

GPT-5.6 Sol Ultra, a version of OpenAI's GPT model, was used to produce a proof for the Cycle Double Cover Conjecture. This problem had gone unsolved for 50 years, but the model was able to find a solution in under an hour using 64 subagents working in parallel. However, the proof's simplicity and lack of citations for prior work have raised concerns.

Why it matters

As a business owner, you might wonder how AI's ability to quickly solve complex problems affects your operations. While AI's strengths in pattern recognition and processing large amounts of data can be valuable, this achievement also highlights the potential for AI to recombine existing knowledge rather than creating entirely new ideas.

The takeaway

This development underscores the importance of understanding the limitations and capabilities of AI in your business, and using it in ways that complement human expertise and judgment.

Read the original at The Decoder

Our plain-English take, written from public reporting for operational business owners. Always read the original for full context.

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