Run: 2026-07-08-01KX1M8G2T7QX2XTP4XR7BWT8G

Run Details

Model:
Grok 4.5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.3s
Cost:
$0.013400
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 cold rain poured heavily over the quiet old mansion as the detective arrived late at the crime scene now. Inside the dimly lit library a bloody knife lay next to the lifeless body of the wealthy Lady Harrington herself. The detective carefully examined the room noticing an open window and muddy footprints leading out into the dark garden outside. Servants gathered in the hallway whispering nervously about who could have committed such a horrible crime in this place tonight. Suddenly a loud bang from upstairs made everyone freeze in fear wondering if the killer was still among them all.
created_at"2026-07-08T19:46:14.24Z" 7/8/2026, 7:46:14 PM
model"x-ai/grok-4.5-20260708"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency536
moderation_latency(null)
generation_time18194
tokens_prompt46
tokens_completion618
native_tokens_prompt241
native_tokens_completion2185
native_tokens_completion_images(null)
native_tokens_reasoning2078
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"
usage0.0134
router(null)
provider_responses
0
endpoint_id"0e927811-b1a8-4604-8b86-db5ce6eaa87c"
id"fd7f6686-a868-95bb-9cc1-3fe61bf069ae"
is_byokfalse
latency201
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-1783539974-E2dV1eaaZRV099Jo9vxr"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783539974-RFvu5phEJGvMlaR4sbrt"
upstream_id"fd7f6686-a868-95bb-9cc1-3fe61bf069ae"
total_cost0.0134
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
sentences5
wordCounts
020
120
220
320
420