GPT-6.1 Sol brings near-Astra capability to a lower-cost production tier
OpenAI made GPT-6.1 Sol available on September 29 as a lower-cost model for complex coding, computer use, and professional work with performance positioned near GPT-6 Astra. The official model page lists a 1.05-million-token context window, a 128,000-token output limit, five supported reasoning-effort levels, and Responses API tool calling. Standard API pricing is listed at $2 per million input tokens and $10 per million output tokens. A same-day safety addendum classifies cybersecurity capability as Critical and biological and chemical capability as High, with the Astra safeguard stack applied. Teams should route real tasks through a controlled comparison of quality, latency, total token use, tool success, refusals, and data-residency requirements before changing a production default.
