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Anthropic asked AI to crack Riemann. I asked AI to spot a maths joke.
Anthropic asked its AI to "take a real stab" at the Riemann hypothesis, a 167-year-old mathematical mystery with a million-dollar prize. Claude did not win the prize. What it did do is push a stubborn 41.6% floor to 67.2% on a related problem, formally verified, and praised by Oxford’s James Maynard as "a genuinely interesting mathematical contribution." Then a small experiment of my own: five leading AI models given a maths puzzle that hides a visual joke. Only two spotted it. A story about two corners of intelligence, and the humility and scepticism they demand.
DeepSeek V4 Has Launched. Time to Seek Deeper and Compare AI Models.
DeepSeek V4 launched on 24 April 2026. Open source. MIT licence. 1 million token context. $0.28 per million output tokens. 99% cheaper than GPT-5.5 and Claude on output. The advisory brief I wrote six weeks ago is now testable. No single model wins everything. But the door for regulated enterprises is now open.
Advisory Brief: Seek Deeper in DeepSeek
DeepSeek V4 is expected to launch any time now, before China's Two Sessions in 2026. It is open source, a benefit none of its competitors can match. For regulated sectors where data sovereignty matters, this is the first frontier AI that enterprises can download and run on their own servers, with data never leaving their premises. An advisory brief for boards and management teams before it launches.