Advancing the price-performance frontier with GPT‑5.6

OpenAI cut GPT-5.6 Terra prices by 20% and GPT-5.6 Luna prices by 80%. Luna now costs $0.20/million input tokens and $1.20/million output, undercutting Google's Gemini 3.1 Flash-Lite and Anthropic's Claude Haiku 4.5. The reductions were enabled by GPT-5.6 Sol optimizing inference and load balancing.