Run: 2026-10-06-01M48VWSNRXVXSZQPT9VFZNESP

Run Details

Duration:
7.8s
Cost:
$0.000918
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
62.72% 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 old lighthouse keeper found the body at dawn, sprawled across the rocks below with blood pooling in the tide. Inspector Mara Voss arrived by boat, her coat flapping wildly as she climbed the steep path toward the grim discovery. Three guests had stayed overnight at the isolated lighthouse, each with secrets and motives hidden beneath polite smiles and nervous laughter. The victim was a wealthy art dealer who had purchased the lighthouse only last month, angering locals who wanted it preserved. Mara studied the scene carefully, noting the single set of footprints leading away from the body toward the eastern cliff edge. Rain began to fall suddenly, threatening to wash away evidence as the inspector knelt beside the cold, unmoving form. A torn photograph fluttered from the dead man's pocket, showing him with a woman none of the guests would identify or acknowledge. The lighthouse keeper claimed he heard nothing, though his trembling hands suggested guilt or fear or both combined together. Mara photographed everything methodically before the storm could destroy what little evidence remained on those wet, slippery stones. She would question each guest separately, watching their eyes for tells, searching for the killer among these frightened, desperate people. The tide was rising now, and soon the rocks would disappear beneath gray water, taking secrets with them into the deep. Someone had planned this murder carefully, choosing the storm and the isolation to ensure no witnesses would ever come. Mara pulled her notebook from her pocket, ready to record statements that would unravel lies and expose the truth eventually. The lighthouse beam swept across the scene in steady rhythm, indifferent to death, continuing its eternal watch over the sea. Three suspects remained, each with opportunity, each with motive, each capable of the violence that had ended this man's life. The inspector knew that by nightfall, one of them would confess or break, unable to bear the weight of what they had done. Dawn had brought death to this place, and only darkness could hide the murderer from the justice that Mara Voss would deliver.
created_at"2026-10-06T15:04:13.247Z" 10/6/2026, 3:04:13 PM
model"mistralai/mistral-large-4-0-20261006"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1528
moderation_latency(null)
generation_time7738
tokens_prompt46
tokens_completion537
native_tokens_prompt50
native_tokens_completion423
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"
usage0.00091807
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791299053-qvEP7B50T6Gv65VrUcu2"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791299053-DWxV5RHnPhfaMAQJYrfp"
upstream_id"20b746c7a2914ac095b48982f9b976e8"
provider_responses
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endpoint_id"19b3b5d7-23f6-4b63-8109-64a6cc37d996"
id"20b746c7a2914ac095b48982f9b976e8"
is_byokfalse
latency1527
model_permaslug"mistralai/mistral-large-4-0-20261006"
provider_name"Mistral"
status200
total_cost0.00091807
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
62.72% Matches word count n/a
neededCleanfalse
sentences17
wordCounts
020
120
221
321
421
519
622
719
818
920
1021
1119
1220
1320
1420
1523
1622