Recent US-China summit outcomes in late September 2026 explain the 91.7% market-implied odds against an agreement to pace the AI frontier this year. Leaders established an AI dialogue set for November and an incident notification channel focused on risks like cyberattacks, yet President Trump publicly ruled out any slowdown, joint development, or pause, stressing the US lead of at least a year and a half in frontier large language models and capabilities. Traders view these steps as deconfliction measures rather than competitive restraint, consistent with ongoing export controls and separate national AI acceleration. A November breakthrough or major safety incident could shift sentiment, though current verified statements and timelines make such an outcome unlikely before year-end.