Run: 2026-10-06-01M48VRZ801WCXSQ9C9FKDQY0W

Run Details

Duration:
9.8s
Cost:
$0.000548
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
33.21% 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 antique clock in the hallway struck thirteen times as Detective Mara Voss stepped through the front door that evening. She noticed immediately that the dining room chandelier had been shattered across the Persian rug below it. Three guests sat frozen at the dinner table, their faces pale with shock and something else entirely. The victim, renowned art dealer Julian Blackwood, lay sprawled beside his untouched plate of coq au vin. His silver pocket watch had stopped at exactly nine seventeen, though no one could remember hearing any gunshot. Mara photographed the scene carefully before anyone could disturb the fragile evidence scattered across the room. A single white rose lay on Blackwood's chest, its stem snapped cleanly and dripping crimson onto his silk shirt. The butler, Henderson, stood by the kitchen door with trembling hands and a story he clearly wanted desperately to tell. Outside, rain began falling against the tall windows, washing away footprints that might have led toward the garden gate. Mara asked each guest to remain exactly where they were until she finished her preliminary examination of everything. The murder weapon, she suspected, was still hidden somewhere within these walls, waiting to be discovered by her.
created_at"2026-10-06T15:02:07.881Z" 10/6/2026, 3:02:07 PM
model"mistralai/mistral-large-4-0-20261006"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency791
moderation_latency(null)
generation_time9782
tokens_prompt46
tokens_completion313
native_tokens_prompt50
native_tokens_completion246
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"
usage0.00054814
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791298927-EzOnIZCqmEtufdkBmRo8"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791298927-vviMd8Ccm1H9L5IhKhB7"
upstream_id"dc8b8c7eb8c140289a71930bdcf07e46"
provider_responses
0
endpoint_id"19b3b5d7-23f6-4b63-8109-64a6cc37d996"
id"dc8b8c7eb8c140289a71930bdcf07e46"
is_byokfalse
latency777
model_permaslug"mistralai/mistral-large-4-0-20261006"
provider_name"Mistral"
status200
total_cost0.00054814
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
33.21% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
020
117
217
317
418
516
619
720
819
918
1018