Run: 2026-05-01-01KQHSMFP4X4TFZMF9XKXVZDM7

Run Details

Model:: Grok 4.20 (Reasoning)
Test:: Data extraction
Scenario:: Contextual pronoun
Duration:: 15.5s
Cost:: $0.001375
Provider:: xAI

Evaluation summary

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

Model input

User/Human

Who does "he" refer to in the last sentence? Only return the name.

Tom and Jerry were playing in the yard. Spike, the dog, was watching them from his kennel. Suddenly, he started barking loudly.

Model response

Spike

The pronoun "he" in the final sentence has Spike as its antecedent: the second sentence establishes Spike (a dog) as the subject performing the action of watching, and barking is a typical canine behavior that logically continues from the kennel-setting detail. Tom and Jerry are pluralized as "them" in that same sentence, ruling them out as singular "he." No other entities are introduced, so coreference resolution points unambiguously to Spike.

Evaluation details

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