GPT-5.6 Sol: Complete Guide to OpenAI’s Best Model Yet
GPT-5.6 Sol is OpenAI’s flagship model, launched publicly on 9 July 2026 alongside Terra and Luna. This guide maps the tier scheme, the full API price list including the 272K long-context surcharge, honest benchmarks against Anthropic’s Claude, and availability across ChatGPT plans and cloud platforms. It closes with what the Doug pre-training project and Astra signal about GPT-6.
