Its stated API list prices are $4 per million input tokens, $20 per million output tokens, and $0.20 per million cache reads. Versus Opus 5, Anthropic says input and output are 20% cheaper and cache reads are 60% cheaper. The company advises users to inspect /usage after a session and compare equivalent tasks by turns, output tokens, and cache use; its examples are illustrative and exclude cache writes.
Raw SignalSep 22, 20261 min read1 source
What a task costs on Opus 5.5
In one minute
Anthropic published task-cost guidance for Claude Code on Opus 5.5, framing spend around completed agentic work rather than token price alone.