Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k
Claude Code consumes significantly more tokens than OpenCode due to heavy system prompts and inefficient prompt caching.
Benchmarking shows Claude Code sends 33,000 tokens of scaffolding per request compared to OpenCode's 7,000. While OpenCode maintains byte-identical prefixes for efficient caching, Claude Code frequently rewrites prompt-cache tokens mid-session, leading to higher operational costs.