Run: 2026-10-06-01M48VQAR55AYQF7B9P073K0PQ

Run Details

Duration:
7.4s
Cost:
$0.000577
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
78.31% 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 of Blackwood Manor. Rain lashed against the tall Gothic windows while thunder rolled across the Yorkshire moors that distant evening. Lord Pemberton's body lay sprawled upon the Persian rug, his silver letter opener protruding from his chest with terrible precision. Three guests remained in the drawing room, each claiming they had been alone when the fatal blow was struck downstairs. The butler, Mrs. Crenshaw, stood rigid by the fireplace, her knuckles white around a silver tray of untouched champagne glasses. A single red rose lay beside the corpse, its thorns removed with surgical care by some unknown hand that night. Mara knelt beside the body, noting how the blood had pooled in a perfect circle, suggesting the killer had waited patiently. The grandfather clock had stopped at 9:47, though no one could explain why it had ceased its steady rhythmic heartbeat. Footprints in the mud outside suggested someone had entered through the garden, bypassing the locked doors and alarmed windows entirely. The victim's pocket watch, still running, showed 9:52, creating a five-minute window that would haunt the investigation for weeks.
created_at"2026-10-06T15:01:14.121Z" 10/6/2026, 3:01:14 PM
model"mistralai/mistral-large-4-0-20261006"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency818
moderation_latency(null)
generation_time7377
tokens_prompt46
tokens_completion313
native_tokens_prompt50
native_tokens_completion260
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native_tokens_reasoning0
native_tokens_cached0
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num_media_completion0
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origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
service_tier"default"
usage0.0005774
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791298874-TJAFTu4rDPRFH0930HTm"
session_id(null)
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api_type"completions"
id"gen-1791298874-TzKGUVws6qcSHIfkCj5J"
upstream_id"2504236db68941e39098dd71a2e6cf26"
provider_responses
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endpoint_id"19b3b5d7-23f6-4b63-8109-64a6cc37d996"
id"2504236db68941e39098dd71a2e6cf26"
is_byokfalse
latency818
model_permaslug"mistralai/mistral-large-4-0-20261006"
provider_name"Mistral"
status200
total_cost0.0005774
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
78.31% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
117
220
320
420
520
621
720
820
919