Model Routing Cut API Costs by 85% vs Claude Max Subscription – A Developer's Analysis

A Reddit user on Claude Max ($200/month) broke down their daily token usage and found that only ~15% of tasks actually required Opus-level reasoning. The rest — file reads, git status, test generation, scaffolding, formatting, renaming, simple refactors — could be handled by cheaper models like Sonnet with identical quality.

Usage Breakdown

• ~40% – File reads, git status, project context scanning (no need for frontier model)
• ~25% – Test generation, scaffolding, boilerplate (Sonnet excels here)
• ~20% – Formatting, renaming, simple refactors (literally any model works)
• ~15% – Hard reasoning, cross-file architecture (the only part needing Opus)

By routing the 85% of non-critical tasks to Sonnet (~$0.28/MTok) and reserving Opus only for the 15% that needed deep reasoning, the user cut API costs from $200 down to roughly $30 in extra usage. Output quality remained identical because the hard tasks still used Opus.

Key Takeaway

The subscription model hides per-task cost visibility — no token breakdown, no per-task cost breakdown — just a quota that shrinks. Model routing gives you direct control over which model handles which type of work, with no quality loss.