Run: 2026-05-01-01KQHT403KTNY3M7FBM7CGS7WJ

Run Details

Model:: Grok 4.20 (Reasoning)
Test:: Data extraction
Scenario:: Indirect birth year
Duration:: 8.4s
Cost:: $0.001513
Provider:: xAI

Evaluation summary

Score	Evaluator	Details Link
Fail	Matches text	(details)
Pass	Matches Regex	(details)
no eval	Overall

Model input

User/Human

What year was Sarah born? Only return the year as a four-digit number.

In 2023, Sarah celebrated her 30th birthday with a big party. Her younger sister, who is 5 years younger, couldn't attend because she was studying abroad.

Model response

1993

The calculation is direct: subtract Sarah's age (30) from the reference year given in the text (2023). This yields 1993 with no ambiguity in the phrasing "celebrated her 30th birthday," which denotes the year she turned 30. The clause about her sister supplies no numeric offset or alternative date that modifies Sarah's birth year, rendering it extraneous to the required output.

Evaluation details

Result	Evaluator	Details	Meta Data
Fail	Matches text	Case sensitive: 1993	n/a
Pass	Matches Regex	/\b1993\b/	n/a
no eval