OpenAI launched GPT-6 Astra in early September 2026 as its flagship large language model, setting official API pricing at $10 per million input tokens and $50 per million output tokens to reflect top-tier performance in computer use, cybersecurity exploits, advanced reasoning benchmarks, and professional workflows. This premium rate positions Astra well above siblings such as GPT-6 Sol and GPT-6.1 Sol at $10 output or the lighter GPT-6 Luna at $0.50, while batch and flex routes immediately offered 50% discounts that traders monitor for broader adoption. Competitive pressure from other frontier labs, demand for its 1.05M-token context and agentic features, and potential year-end optimizations or enterprise deals remain the key variables that could shift the output-token price floor or ceiling before 2026 closes.