GPT-5.6

GPT‑5.6 is OpenAI’s latest frontier model family, launched as three variants—Sol (flagship), Terra (balanced), and Luna (low‑cost)—designed to deliver maximum intelligence per token and per dollar. It introduces ‘ultra’, a multi‑agent mode that coordinates up to 16 parallel agents to tackle complex long‑horizon tasks faster. With state‑of‑the‑art results on coding, reasoning, cybersecurity, and scientific benchmarks, GPT‑5.6 sets new efficiency standards: Sol beats Claude’s Fable 5 on major evaluations while using fewer tokens, lower latency, and roughly half the estimated cost. Robust safety measures, including extensive red‑teaming and real‑time monitoring, underpin the launch. Target users are developers and enterprises building autonomous agents, coding assistants, and knowledge‑work applications who need frontier intelligence that scales affordably.