How to cut your Claude Code bill by 40% without changing your workflow

The 40% number is real

Teams running Tokeven instrumentation consistently find 30-50% savings within the first two weeks. Not from writing less code or switching away from Claude — from three specific techniques.

1. Model-tier picking

Most developers default to Opus for everything. But 60-70% of Claude Code calls are completions, refactors, and explanations that Sonnet handles equally well at one-fifth the price.

The fix: look at your usage breakdown by task type. Summarization, code review, and simple generation almost never need the flagship tier. Reserve Opus for complex multi-file reasoning and architecture decisions.

2. Prompt caching

Cache-read tokens cost 90% less than input tokens. If your system prompt or context window includes the same large block of text across calls, caching eliminates most of the input cost.

• -Structure prompts so the static portion comes first
• -Keep the variable portion at the end
• -Reuse sessions where possible to maximize cache hits

3. Prompt-length discipline

Longer prompts cost more — not just in input tokens, but in the output they generate. A 2,000-token prompt that could be 400 tokens is wasting 80% of your input spend and often producing longer, less focused responses.

• -Cut preamble and restated context the model already has
• -Use references ("see the function above") instead of pasting code twice
• -Set explicit max_tokens to cap runaway output

Measuring the impact

The savings compound. A team doing 10,000 calls/month at an average of $0.08/call spends $800. Dropping 60% of those calls to Sonnet ($0.02), caching the rest, and tightening prompts typically brings the bill to $450-$500. That's real money, and the code quality stays the same.