Is Claude Haiku 4.5 or Claude Opus 5.5 cheaper?
Claude Haiku 4.5 is cheaper ($1 / 1M tokens input / $5 / 1M tokens output) vs Claude Opus 5.5 ($4 / 1M tokens input / $20 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.