GPT-5.6 Terra is a balanced AI model in the OpenAI GPT-5.6 family, positioned between the high-performance GPT-5.6 Sol and the cost-efficient GPT-5.6 Luna. It is designed to provide an optimal balance of intelligence, speed, and operational cost for a wide range of AI applications.
Compared with GPT-5.6 Sol, Terra offers a more cost-effective high-performance experience. Compared with GPT-5.6 Luna, it delivers stronger reasoning capabilities and improved task execution performance.
GPT-5.6 Terra supports text and image inputs, tool calling, structured outputs, and long-context understanding. It is suitable for software development, enterprise knowledge management, data analysis, AI Agent workflows, automation, and everyday productivity tasks.
GPT-5.5 Pro
100 I’ve been using GPT-5.5 Pro with a few colleagues for the past several weeks, mostly on the kinds of jobs where regular chatbots tend to fall apart: long documents, messy research questions, code debugging, and tasks that need more than one or two steps of reasoning.
OpenAI
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