OpenAI 大幅降价 GPT-5.6，Luna 成最便宜模型
原标题：Advancing the price-performance frontier with GPT‑5.6
AI 摘要
OpenAI 今日宣布 GPT-5.6 Terra 和 Luna 模型大幅降价，其中 Luna 降价 80%，输入价格降至每百万 tokens 0.20 美元，输出 1.20 美元，低于 Google Gemini 3.1 Flash-Lite 和 Anthropic Claude Haiku 4.5。OpenAI 使用 GPT-5.6 Sol 优化推理过程，包括负载均衡和内核重写，使端到端服务成本降低 20%。作者已将演示站点从 Gemini 切换到 Luna。
正文节选
30th July 2026 - Link Blog Advancing the price-performance frontier with GPT‑5.6 (via) Huge price drop from OpenAI today: GPT-5.6 Terra got a 20% reduction, and GPT-5.6 Luna got a massive 80% drop. OpenAI credit 5.6 Sol with enabling this: in How GPT‑5.6 fuses frontier intelligence with frontier efficiency they describe using 5.6 Sol to optimize load balancing, and more impressively to optimize inference itself: We also used GPT‑5.6 Sol to optimize the model’s forward pass: the computation that