GPT-5.6 Terra sits between Luna and Sol in OpenAI’s GPT-5.6 family. The corpus scores it at 51.5% on PostTrainBench, slightly ahead of Sol, in the item where Sol post-trained Luna, and records its 20% price trim in the July 2026 cut credited to kernels the models rewrote themselves.
AISystem
GPT-5.6 Terra
OpenAI's mid-tier GPT-5.6 variant, scored at 51.5% on PostTrainBench and trimmed 20% in price in the July 2026 efficiency campaign.
Sources
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- Welcome to July 30, 2026 (theinnermostloop.substack.com)
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