What a task costs on Opus 5.5 | Claude by Anthropic
Claude Code tasks cost money based on four factors: the number of turns (which resend the conversation), cache hit rates (dramatically cheaper than fresh reads), output tokens including thinking (the most expensive element), and model choice. Opus 5.5 is 20% cheaper on input and output tokens and 60% cheaper on cached reads than Opus 5, shifting the economics significantly toward long, cache-heavy sessions. The post provides interactive calculators and concrete guidance: use Opus 5.5 as your daily driver for supervised work, raise effort level before switching models, put lookup tasks on smaller models like Sonnet, keep sessions moving to maintain cache warmth, and crucially, measure your own real tasks to understand how these tradeoffs apply to your specific codebase and workflow.