Run: 2026-05-01-01KQHRHT2E5RT0JD6YCHHYQ2BN

Run Details

Duration:
42.5s
Cost:
$0.012777
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The dark storm clouds gathered overhead while the wealthy estate guests made their way to the remote mansion that night. Upon entering the luxurious mansion the charming host greeted every guest offering them each a glass of expensive champagne immediately. Suddenly a terrified scream rang out from the private study alerting all of the party guests to the emergency there. The guests rushed into the study and discovered the body of a man lying dead from a severe head wound.
created_at"2026-05-01T12:34:53.651Z" 5/1/2026, 12:34:53 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency41928
moderation_latency(null)
generation_time42485
tokens_prompt46
tokens_completion1090
native_tokens_prompt159
native_tokens_completion5058
native_tokens_completion_images(null)
native_tokens_reasoning4974
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"
usage0.01277655
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"dabb29c4-11bd-c24b-c53f-180e766230fb"
is_byokfalse
latency117
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-1777638893-oyF7JkcXyQ3hZ3Nqtdwl"
session_id(null)
api_type"completions"
id"gen-1777638893-slA3cRGmYw3RJvOXuPdX"
upstream_id"dabb29c4-11bd-c24b-c53f-180e766230fb"
total_cost0.01277655
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences4
wordCounts
020
120
220
320