Run: 2026-05-01-01KQHT55CF1PMG0PV7BPQ1CFC0

Run Details

Model:: Grok 4.20 (Reasoning)
Test:: Data extraction
Scenario:: Contextual pronoun
Duration:: 8.6s
Cost:: $0.001358
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 last sentence's pronoun "he" is resolved via standard anaphora rules: the immediately preceding subject is "Spike, the dog," whose typical action is barking and whose location (kennel) is consistent with a dog that suddenly vocalizes. Neither Tom (cat) nor Jerry (mouse) produces barks, eliminating them as antecedents on both syntactic and semantic grounds. This leaves Spike as the only referent that satisfies all constraints without requiring extra discourse assumptions.

Evaluation details

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