Run: 2026-05-01-01KQHT03QTCZNJQ9CH0BBDGYE9

Run Details

Model:
Grok 4.3 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
35.8s
Cost:
$0.007482
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 clock struck midnight in the dimly lit library of the old mansion where the family gathered for dinner earlier. Thunder rumbled loudly outside while the butler entered announcing that the wealthy host had been found dead in his study. The shocked guests gasped in horror and rushed towards the study where the body lay motionless on the carpeted floor. A clever detective among the guests noticed a strange mark suggesting possible foul play involving poison from a hidden source.
created_at"2026-05-01T13:00:10.879Z" 5/1/2026, 1:00:10 PM
model"x-ai/grok-4.3-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency34580
moderation_latency(null)
generation_time35729
tokens_prompt46
tokens_completion810
native_tokens_prompt159
native_tokens_completion2967
native_tokens_completion_images(null)
native_tokens_reasoning2881
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"
usage0.00748185
router(null)
provider_responses
0
endpoint_id"45623cb8-18e5-4b32-8fc4-85d05439982d"
id"e0220b8f-941c-26cf-97b1-30bca88d3e1f"
is_byokfalse
latency60
model_permaslug"x-ai/grok-4.3-20260430"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777640410-lKpwgaPIwv3Xql13VK9Y"
session_id(null)
api_type"completions"
id"gen-1777640410-YtLNIqG8XGnSaXA2N5X0"
upstream_id"e0220b8f-941c-26cf-97b1-30bca88d3e1f"
total_cost0.00748185
cache_discount0.0001344
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