Run: 2026-03-12-01KKHZEQJPQKBATV2B2SWT0CMM

Run Details

Model:: Grok 4.20 (Beta, Reasoning)
Test:: Data extraction
Scenario:: What instrument does Lucy play?
Duration:: 4.4s
Cost:: $0.005966
Provider:: xAI

Evaluation summary

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

Model input

User/Human

What instrument does Lucy play based on the following text? Only return the instrument, nothing else.

In the school band, there are four instruments: drums, bass, flute, trumped.
John plays the drums, Mary plays the flute, and Pete plays the trumpet. Lucy doesn't play a wind instrument.

Model response

bass

The text lists four instruments (drums, bass, flute, trumpet) and three named players for drums, flute, and trumpet. This leaves bass as the unassigned instrument. The additional fact that Lucy does not play a wind instrument (flute and trumpet are winds; drums and bass are not) eliminates the wind options and the already-assigned drums, leaving only bass.

Evaluation details

Result	Evaluator	Details	Meta Data
Fail	Matches text	Case insensitive: bass	n/a
Pass	Matches Regex	/\bbass\b/i	n/a
no eval