Altman Warns GPT-5.6 Sol Demand Is 'Insane' and 'Hiccups' Are Coming — Inference Is the Binding Constraint

Axios·medium signal

Altman posted July 14 that Sol's 'growth is insane,' credited the inference team's 'heroic work,' and warned 'it is possible there are some hiccups soon' as OpenAI scrambles to add capacity. The candid capacity warning lands the same week Sol becomes the preferred model in Microsoft 365 Copilot, amplifying load. Builders relying on Sol for long agent runs should plan for rate-limit turbulence and keep a fallback model wired in.