Is Gemini 4 Argon or GPT‑6 Luna cheaper?
GPT‑6 Luna is cheaper ($0.1 / 1M tokens input / $0.5 / 1M tokens output) vs Gemini 4 Argon ($2 / 1M tokens input / $10 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.