Run: 2026-10-06-01M48W1ZD2AVDP7MW143T4BTBX

Run Details

Duration:
17.0s
Cost:
$0.000479
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
67.74% 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 autumn wind howled through the skeletal branches of Blackwood Manor as Detective Inspector Mara Voss arrived at the iron gates. She stepped from her battered sedan and stared up at the Victorian mansion looming against the bruised purple sky overhead. A single light burned in the third-floor window, flickering like a dying heartbeat in the gathering darkness outside. Constable Finch emerged from the shadows, his face pale beneath the gas lamp that sputtered and hissed with dying breath. "The body's in the library, Inspector," he whispered, his voice trembling like a leaf caught in the howling October gale. "Lord Blackwood himself, murdered most foul, and the family's already gathering like vultures in the drawing room below." Mara adjusted her gloves and walked toward the heavy oak doors, her footsteps echoing on the gravel path with terrible finality. She did not look back at the hearse waiting by the gate, its black paint gleaming wetly in the rain.
created_at"2026-10-06T15:07:02.957Z" 10/6/2026, 3:07:02 PM
model"mistralai/mistral-large-4-0-20261006"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency638
moderation_latency(null)
generation_time16932
tokens_prompt46
tokens_completion243
native_tokens_prompt50
native_tokens_completion213
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
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"stop"
service_tier"default"
usage0.00047917
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791299222-6GjZsTp38i5zE4GcBvqw"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791299222-4Vx2aPIoUvJcRrezYQhw"
upstream_id"439c2789e65445049d98b112b63625ad"
provider_responses
0
endpoint_id"540e63db-cc7c-4556-bb67-d449579bcf1a"
id"439c2789e65445049d98b112b63625ad"
is_byokfalse
latency638
model_permaslug"mistralai/mistral-large-4-0-20261006"
provider_name"Mistral"
status200
total_cost0.00047917
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
67.74% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
021
120
218
320
420
539
620