Run: 2026-10-07-01M4ATPRN4VZRG4NYVFHSK7A5P

Run Details

Duration:
2.4s
Cost:
$0.001891
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
23.17% 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 grand library fell silent as the clock struck midnight with an eerie, echoing chime through dusty shelves. Detective Harlow adjusted his glasses, scanning the dim room where shadows stretched long across the polished floor. A single bloodstain marred the Persian rug, its dark edges creeping like ink across the intricate patterns. The victim lay sprawled near the fireplace, one hand clutching a torn page from a rare, leather-bound book. Whispers of the dead seemed to linger in the air, though no living soul dared to speak above a hush. Harlow knelt, noticing a silver locket glinting beneath the victim’s stiffened fingers, its chain snapped in two. The butler stood rigid by the door, his pale face betraying nothing as his gloved hands trembled slightly. A storm raged outside, rattling the stained-glass windows with a fury that matched the tension in the room. Somewhere in the house, a floorboard creaked, sending a shiver down Harlow’s spine despite his years of experience. The case had begun, and every guest in the mansion was now a suspect under the detective’s sharp gaze.
created_at"2026-10-07T09:21:55.886Z" 10/7/2026, 9:21:55 AM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency256
moderation_latency(null)
generation_time2387
tokens_prompt46
tokens_completion282
native_tokens_prompt51
native_tokens_completion242
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)
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web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
service_tier"default"
usage0.0018915
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791364915-z1Fq69WydllWFNhGWJxS"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791364915-q0flkeopxDoIKuoVf4Bi"
upstream_id"89be275e1f1c4494bf8e5791449247a1"
provider_responses
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endpoint_id"d21d316f-d540-4718-b36e-3beff85d0cf9"
id"89be275e1f1c4494bf8e5791449247a1"
is_byokfalse
latency256
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0018915
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
23.17% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
018
117
217
318
420
517
618
718
818
919