Run: 2026-03-12-01KKHYVFAWK7YHZR2X7WQ4D81R

Run Details

Model:: Grok 4.20 (Beta, Reasoning)
Test:: Data extraction
Scenario:: Contextual pronoun
Duration:: 2.6s
Cost:: $0.003812
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 anaphorically refers to the most recent and semantically plausible antecedent: "Spike, the dog" (the only entity that barks and is located in a kennel). Tom and Jerry are introduced as a plural pair playing in the yard and have no semantic association with barking, so they are ruled out by both syntactic recency and world knowledge about canines. No other male referent is present, confirming the resolution to Spike with high confidence.

Evaluation details

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