Run: 2026-09-25-01M3CKEF74T2HVSXQZKD9R68RX

Run Details

Duration:
2.6s
Cost:
$0.001629
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
0.12% 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. Detective Harlow adjusted his glasses, scanning the shadowed shelves for any sign of movement. A single candle flickered on the mahogany desk, casting long, trembling shadows across the floor. The victim lay sprawled near the fireplace, a crimson stain spreading across his tailored waistcoat. His pocket watch had stopped at exactly eleven forty-seven, the hands frozen in time forever. A torn page from a rare manuscript clutched in his stiff fingers hinted at a motive. The scent of bitter almonds lingered in the air, a telltale sign of poison’s deadly embrace. Footsteps echoed in the hallway, but no one appeared when Harlow called out into the darkness. The butler’s hands shook as he claimed to have seen nothing unusual that fateful night. A shattered brandy glass lay near the body, its pieces glinting like jagged teeth in the firelight.
created_at"2026-09-25T15:37:51.083Z" 9/25/2026, 3:37:51 PM
model"mistralai/mistral-medium-3.5-20260430"
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external_user(null)
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cancelledfalse
latency357
moderation_latency(null)
generation_time2513
tokens_prompt46
tokens_completion243
native_tokens_prompt51
native_tokens_completion207
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"
usage0.001629
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790350671-goMtzpAcz7wUkAkJuH33"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790350671-06bqMEX6JE2vvdLqPznZ"
upstream_id"d05188f4552047f9880826b525aeb0f0"
provider_responses
0
endpoint_id"38ef23a9-5cb3-46fa-85ec-7aed174f04eb"
id"d05188f4552047f9880826b525aeb0f0"
is_byokfalse
latency356
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.001629
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
0.12% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
015
114
215
315
415
516
616
716
815
917