Run: 2026-05-01-01KQHRQJ33H8Z62M3HNTFG9M2E

Run Details

Model:: Grok 4.20 (Reasoning)
Test:: Data extraction
Scenario:: Contextual pronoun
Duration:: 5.2s
Cost:: $0.001360
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 ("Suddenly, he started barking loudly") directly follows the clause that introduces and describes Spike as the one in the kennel; "he" is the only grammatically and semantically plausible antecedent. Barking is an action canonically performed by a dog (explicitly labeled in apposition to Spike), not by Tom or Jerry, ruling out either of them on world-knowledge grounds. No other masculine singular entity is mentioned, eliminating referential ambiguity.

Evaluation details

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