Run: 2026-03-12-01KKHZT39TAHX029YSXA7PFWZ0

Run Details

Model:: Grok 4.20 (Beta, Reasoning)
Test:: Data extraction
Scenario:: Contextual pronoun
Duration:: 2.1s
Cost:: $0.002714
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 refers to the most recent male singular antecedent that fits the action of barking (a dog behavior). The preceding sentence introduces Spike as the subject ("Spike, the dog, was watching them from his kennel"), making him the clear referent; Tom and Jerry are earlier in the discourse and the described action is inconsistent with their typical identities. This follows standard anaphora resolution rules prioritizing recency, syntactic prominence, and semantic plausibility.

Evaluation details

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