Prompt Lab

Test one prompt template against many inputs. Load rows from CSV, run them against one or two Claude models side by side, check outputs automatically, and export the results.

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1 · Prompt template

Use {{column}} for variables

System prompt (optional, variables allowed)User prompt template

Variables:none yetInsert column:

Rendered preview

Row

User

Your rendered prompt appears here.

2 · Test data 1 rows · 1 selected

Upload CSV

Paste CSV instead

	#
	1

3 · Run

Model ACompare with (optional)EffortMax tokensParallel requests

Automatic check

1 row × 1 model · ~11 input tokens · est. $0.00804 (max $0.0400)

Add your API key above to run.