GPT-5.6 Pricing: What Sol, Terra, and Luna Mean for Your AI Coding Budget
OpenAI's GPT-5.6 family went GA on July 9, 2026 with three price tiers: Sol at $5/$30, Terra at $2.50/$15, and Luna at $1/$6 per million tokens. Here is what the tiering changes for engineering budgets, and why model routing just became the biggest lever on your coding bill.