Run: 2026-05-01-01KQHSKJHFEWB4V335AB384P4T

Run Details

Duration:
7.2s
Cost:
$0.001453
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

AI
Spike The last sentence's pronoun "he" has a clear antecedent in the immediately preceding sentence, where "Spike, the dog" is the only grammatically and semantically compatible referent: the noun phrase is masculine, singular, and the only entity described as being in a position (inside a kennel) from which barking would naturally emanate. Tom and Jerry are introduced as a coordinated plural subject ("Tom and Jerry were playing"), so they cannot match the singular pronoun; moreover, the real-world and cartoon knowledge that dogs bark while cats and mice do not supplies an immediate pragmatic cue that eliminates any other possible referent. Pronoun resolution therefore follows standard centering-theory preferences (subject > object, recency, and semantic fit), all of which converge on Spike.
created_at"2026-05-01T12:53:20.051Z" 5/1/2026, 12:53:20 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4456
moderation_latency(null)
generation_time7182
tokens_prompt51
tokens_completion259
native_tokens_prompt170
native_tokens_completion523
native_tokens_completion_images(null)
native_tokens_reasoning372
native_tokens_cached64
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0014528
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"900444f0-c776-990d-a61b-b8257dbdec76"
is_byokfalse
latency105
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777640000-2TykBzRXHJe9TvLHqOq6"
session_id(null)
api_type"completions"
id"gen-1777640000-z5v9OoDN8pOTFnQ0EeFX"
upstream_id"900444f0-c776-990d-a61b-b8257dbdec76"
total_cost0.0014528
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

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