GPT-5.6 Terra (EU)

GPT-5.6 Terra is presented as a balanced model in the gpt-terra series, aimed at capable, cost-efficient everyday work. The available source identifies OpenAI as its creator, but offers no architecture, parameter-count, or training-scale details, so its design should be understood only at that general positioning level.

The strongest independently reported evidence is performance-oriented: Artificial Analysis assigns Terra an overall Intelligence Index score of 56.6, with particular strength in coding at 76.7 and a more moderate 50.2 for agentic tasks. That profile suggests a practical fit for software-development assistance and general reasoning workflows, while the reported 114-token-per-second median output speed and roughly 149-second first-token latency indicate that responsiveness may vary with longer workloads.