Send Claude's Easy Jobs to Haiku 5.5 With One Helper File
We gave Opus and Haiku 5.5 the same job and both got every answer right. Haiku cost 96% less. The test, the one helper file that hands easy jobs to Haiku, the catch, and a prompt that sets it up
The job: find the errors in six log files. Both models found all six. Claude Code reported $0.35 for Opus and $0.014 for Haiku 5.5, about 96% less for the same answer.
Here's the test, the helper file that makes Claude use Haiku for jobs like that, and the catch.
The test
| Opus | Haiku 5.5 | |
|---|---|---|
| Errors found | 6 of 6 | 6 of 6 |
| Cost of the run | $0.347 | $0.014 |
One easy job, one run each, cost as reported by Claude Code (API prices, including Claude Code's own setup text). Your numbers will differ, but the gap on simple jobs is large.
Free, for your email
Get the full setup steps + the copy-paste setup prompt
The rest of this guide (4 more sections, 2 copy-paste prompts) opens right here. The setup prompt, one paste into Claude that sets it all up, comes by email only. Use your real address.
Unlocks: Step 1: make the helper file · Step 2: tell Claude when to use it · The catch · Sources
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