Run: 2026-03-12-01KKHZGSKHE3WEEK126SYQD7QB

Run Details

Model:: Grok 4.20 (Beta, Reasoning)
Test:: Data extraction
Scenario:: What instrument does Lucy play?
Duration:: 2.6s
Cost:: $0.003746
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 assigns John (drums), Mary (flute), and Pete (trumpet). This leaves bass for Lucy. The statement that Lucy does not play a wind instrument confirms this, as flute and trumpet are wind instruments while bass is not (drums is already taken by John).

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