OpenAI宣布GPT-5.6系列模型大幅降价

OpenAI推出了GPT-5.6系列模型的价格调整方案 1。其中，入门款Luna大幅降价80%，输入价格从1美元/百万Token降至0.2美元/百万Token，输出价格从6美元/百万Token降至1.2美元/百万Token 1。中端型号Terra降价20%，输入和输出价格分别为2美元/百万Token和12美元/百万Token 1。旗舰模型Sol保持原价不变，输入价格为5美元/百万Token、输出价格为30美元/百万Token，但新增了Fast mode加速功能，速度相比标准模式提升2.5倍，其使用价格为标准模式的2倍 1。Luna的降价幅度使其输入价格已与上一代GPT-5.4 nano持平 1。

降价源于OpenAI在生产系统优化方面的成果 1。通过GPU Kernel优化和改进推测解码等措施，公司使端到端服务成本下降了20%，同时Token生成效率提升了15%以上 1。OpenAI强调整个优化过程仍然由人类主导，模型虽然参与其中但需要保持"人类在环"的监督机制 1。

OpenAI has unveiled a pricing restructuring for its GPT-5.6 model lineup, with the entry-level Luna variant receiving an 80 percent reduction in costs 1. The Luna model's input price has dropped from $1 to $0.2 per million tokens, while output pricing has fallen from $6 to $1.2 per million tokens 1. The mid-tier Terra model receives a 20 percent price cut, with input and output costs now set at $2 and $12 per million tokens respectively 1. In contrast, the flagship Sol model maintains its existing pricing of $5 for input and $30 for output per million tokens, though it now includes a new Fast mode feature that delivers 2.5 times faster performance at double the standard pricing rate 1.

The cost reductions stem from OpenAI's optimization of its production infrastructure, achieved through GPU kernel enhancements and improvements to speculative decoding that have reduced end-to-end service costs by 20 percent and increased token generation efficiency by over 15 percent 1. OpenAI emphasized that the entire optimization process remains human-guided, with the model participating in improvements while maintaining "Human in the Loop" oversight 1. The Luna model's pricing now aligns with the input cost of the previous-generation GPT-5.4 nano variant 1.