Is Claude Opus 4.6 or Gemini 3.1 Pro Preview cheaper?
Gemini 3.1 Pro Preview is cheaper ($2 / 1M tokens input / $12 / 1M tokens output) vs Claude Opus 4.6 ($5 / 1M tokens input / $25 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.