Run: 2026-05-01-01KQHRVHRW5T7DKZNQBSTV94FD

Run Details

Duration:
5.7s
Cost:
$0.001211
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 pronoun "he" in "Suddenly, he started barking loudly" has its antecedent in the immediately preceding clause that introduces "Spike, the dog," an entity explicitly capable of the action described (barking). Tom and Jerry, by contrast, are engaged in the prior action ("were playing") and lack any semantic association with barking, so coreference to either of them would violate both recency and selectional restrictions. Standard pronoun-resolution heuristics—recency, grammatical role parallelism, and semantic fit—therefore converge uniquely on Spike.
created_at"2026-05-01T12:40:12.832Z" 5/1/2026, 12:40:12 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4199
moderation_latency(null)
generation_time5679
tokens_prompt51
tokens_completion191
native_tokens_prompt170
native_tokens_completion453
native_tokens_completion_images(null)
native_tokens_reasoning345
native_tokens_cached128
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"
usage0.0012106
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"e6e555b5-142c-5d19-2a4e-1a1d3e3617ee"
is_byokfalse
latency90
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-1777639212-kLIt0D7OMGdVUM0EZOnu"
session_id(null)
api_type"completions"
id"gen-1777639212-zpGv6oGSS2ZLPjodn9af"
upstream_id"e6e555b5-142c-5d19-2a4e-1a1d3e3617ee"
total_cost0.0012106
cache_discount0.0001344
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