GPT-5.6 Sol Ultra Cracks Cycle Double Cover Conjecture in Under an Hour

The GPT-5.6 Sol Ultra model has made headlines for solving a major math problem in graph theory, specifically the Cycle Double Cover Conjecture.

This achievement was announced just one day after its general availability on July 9, and the proof was completed in under an hour using 64 parallel subagents.

The Cycle Double Cover Conjecture has been a notoriously difficult problem to solve, with researchers stumped for decades. The conjecture asks whether every graph without a specific type of edge can have its edges covered by a collection of cycles where each edge appears exactly twice.

Naturally, the crypto community responded quickly, launching a meme token called $5.6SolUltr on the Solana blockchain.