Is GPT‑6 Luna or GPT-6.1 Sol cheaper?
GPT‑6 Luna is cheaper ($0.1 / 1M tokens input / $0.5 / 1M tokens output) vs GPT-6.1 Sol ($2 / 1M tokens input / $10 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.