# GPT-5.6 Sol Ultra Just Used 64 Subagents to Crack a 50-Year-Old Math Problem > Source: > Published: 2026-07-11 17:15:12+00:00 OpenAI's GPT-5.6 Sol Ultra orchestrated 64 subagents to prove a math conjecture that stood unresolved for 50 years. The subagents didn't just split the work — they coordinated, each tackling a fragment of the proof, then converged on a result no single model pass had reached. This is the headline that matters for anyone running coding agents: multi-agent orchestration at scale works. Fifty years is a long time for a problem to sit unsolved, and a model with 64 subagents cracked it. It validates the architectural bet that composing smaller, specialized agents can outperform a single monolithic attempt — the same bet that tools like OpenClaw's session fleet and oh-my-pi's model hub are making in the open-source agent ecosystem. For the coding agent community, the 64-subagent pattern is the important signal. The takeaway isn't that GPT-5.6 can do math — it's that routing work across many specialized subroutines is the path to solving problems that defeat a single pass. That architecture is already shipping in coding agents that decompose tasks across multiple model calls. One line: 64 subagents, five-decade-old problem, solved — orchestration at scale works, and it's the same pattern reshaping coding agents today.