OpenAI cuts GPT-5.6 Luna price by 80%, adds Fast mode for Sol

GPT-5.6 如何推进性价比前沿

OpenAI slashed GPT-5.6 Luna's price by 80% and Terra's by 20%. Luna now costs roughly 6% of last year's frontier models per task while running nearly 9× faster. A new Fast mode for GPT-5.6 Sol delivers up to 2.5× speed at 2× price with no intelligence drop. Replit, Notion, Cognition, and others report using Luna for background agent automations, workspace Q&A, and pair programming—citing lower cost, higher speed, and prompt-cache reuse jumping from 24% to 90%.

Why it matters: OpenAI officially announced GPT-5.6 pricing updates: Luna drops 80%, cost falls to 6% of last year's flagship; Sol adds a Fast mode. Concrete numbers, customer quotes (Replit, Notion), substantive product update. Not 85+ because this is pricing/performance optimization of exis...