One endpoint change. Under a minute. Same prompts, same outputs, 70–90% smaller Claude bill.
First — run the free audit →Sign up at aiusage.ai. You get an Anthropic-compatible endpoint that proxies your traffic.
Paste this into your setup:
export ANTHROPIC_API_BASE=https://aiusage.ai/claude
aider --model sonnet your-repo/Works with every Aider model flag and every Anthropic-routed model.
Every Aider request that used to hit Anthropic at retail price now runs through AIUsage's audit layer first. On the six workloads we've verified, the measured delta was 76–84% on the same prompts. Your Aider behavior — autocomplete, chat, agent mode, whatever — doesn't change.
The audit tool is free and shows you exactly what you would have paid. No signup required for the number. If your expected delta is under 40%, the tool tells you outright and you walk. Run the audit →
Audit my own Aider usage →