Advancing the price-performance frontier with GPT‑5.6

OpenAI released GPT-5.6 models with significant price reductions: GPT-5.6 Terra dropped 20% and GPT-5.6 Luna dropped 80%. These cost savings came from using GPT-5.6 Sol to optimize how the model runs, including rewriting the production kernels (core code that performs mathematical operations on GPUs) using AI-assisted code generation, which reduced serving costs by 20% overall.