Run: 2026-07-08-01KX1MGDBQXJYQ3BFDGJ6NWB9W

Run Details

Model:
Grok 4.5 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
34.2s
Cost:
$0.020498
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 fierce thunderstorm crashed loudly against the ancient manor walls when the servant found her dead mistress streaked with blood. Shock and horror quickly filled the spacious house as all guests gathered around the body wondering who committed this murder. The police detective arrived soon after receiving the urgent call and started carefully questioning every person present at the dinner. Many clues pointed clearly toward betrayal by someone close because all the locks were not forced and nothing seemed disturbed.
created_at"2026-07-08T19:50:33.6Z" 7/8/2026, 7:50:33 PM
model"x-ai/grok-4.5-20260708"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency472
moderation_latency(null)
generation_time34096
tokens_prompt46
tokens_completion935
native_tokens_prompt241
native_tokens_completion3368
native_tokens_completion_images(null)
native_tokens_reasoning3283
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"
service_tier"default"
usage0.020498
router(null)
provider_responses
0
endpoint_id"0e927811-b1a8-4604-8b86-db5ce6eaa87c"
id"9dfc9ceb-8559-907d-8d59-f089d588684f"
is_byokfalse
latency130
model_permaslug"x-ai/grok-4.5-20260708"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783540233-m9MuifoMt7y4lzTzorez"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783540233-ydezE8hVRrpzKWcBKcsv"
upstream_id"9dfc9ceb-8559-907d-8d59-f089d588684f"
total_cost0.020498
cache_discount0.000192
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

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