Run: 2026-10-06-01M48W2JHE9CXXY2D7WN0PNFRN

Run Details

Duration:
4.5s
Cost:
$0.000345
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
39.51% 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, though no one had wound it in nearly twenty years. Detective Mara Voss stood frozen on the velvet staircase, her gloved hand gripping the banister with white-knuckled intensity. Below her, Lord Blackwood lay sprawled across the Persian rug, his crystal champagne flute shattered beside his outstretched hand. Three guests remained in the drawing room, each wearing expressions of practiced shock that failed to reach their cold eyes. The storm outside rattled the tall windows, as if nature itself conspired to keep secrets buried deep. Mara descended slowly, counting each step, knowing the killer watched from somewhere in the candlelit shadows above.
created_at"2026-10-06T15:07:22.549Z" 10/6/2026, 3:07:22 PM
model"mistralai/mistral-large-4-0-20261006"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency829
moderation_latency(null)
generation_time4503
tokens_prompt46
tokens_completion178
native_tokens_prompt50
native_tokens_completion149
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"
usage0.00034541
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791299242-6xCbl9wAsClZVhXwyPCu"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791299242-LwKBoEprfzSqo8CKtE01"
upstream_id"c1266c3ffd53436e8eeccf6f1ccf61fe"
provider_responses
0
endpoint_id"540e63db-cc7c-4556-bb67-d449579bcf1a"
id"c1266c3ffd53436e8eeccf6f1ccf61fe"
is_byokfalse
latency825
model_permaslug"mistralai/mistral-large-4-0-20261006"
provider_name"Mistral"
status200
total_cost0.00034541
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
39.51% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
118
219
320
417
517