OpenAI Adds ChatGPT Reasoning Controls With GPT-5.6 Sol for Plus and Pro

OpenAI rolls out a major ChatGPT upgrade, even if you don’t pay for it

OpenAI releases GPT-5.6 Sol (Plus/Pro) and Luna (Free) with reasoning slider and 62–68% reduction in factual errors in legal, medical, and financial domains. Inference-time latency-accuracy slider transforms compliance risk assessment: teams must now codify reliability thresholds per use case and adjust budget models accordingly.