GPT-5.6 Terra Pro

OpenAI's GPT-5.6 Terra and Sol models initially rejected security-related prompts from a researcher, but joining the Trusted Access for Cyber program resolved the issue, allowing testing of the full G…

GPT-5.6 Terra Pro solved 14 of 16 Hack The Box challenges, achieving a benchmark score of 75.1% with a median cost of $0.91 per challenge, according to the HTB-Challenger Benchmark. The model solved a…

OpenAI's GPT-5.6 lineup introduces three tiers—Sol, Terra, and Luna—each with a Pro variant that allocates extra compute for deeper reasoning. Sol targets complex agentic tasks, Terra balances capabil…