OpenAI previews GPT‑5.6: flagship Sol, half‑price Terra, ultra‑fast Luna
OpenAI opened a limited preview of its GPT‑5.6 series, introducing three new models. Sol is the flagship model, Terra matches GPT‑5.5 quality at half the cost, and Luna delivers ultra‑fast, low‑price inference for high‑throughput workloads. Early adopters can test cheaper, faster LLM options now.