Run: 2026-10-27-01M5YJ8YE3T2CE8A3FSGCZK5SQ

Run Details

Duration:
14.1s
Cost:
$0.005896
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% 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 first sign of trouble was the piano, playing softly in a house where everyone believed the pianist was dead. Detective Mara Voss stood beneath the dripping porch, listening as the final notes slipped through the storm and vanished abruptly. Inside, the guests had gathered around the library door, their candlelit faces pale with fear and something resembling guilty anticipation. Lord Ashcombe lay beyond it, sprawled across a Persian rug, with a silver letter opener buried beneath his left collarbone. The library windows were locked, the fireplace was cold, and the only key hung from a chain around his neck. Yet someone had placed a fresh white rose in his hand, its petals untouched by the blood soaking his sleeve. Mara knelt beside the body, noticing a thin crescent of wax beneath one fingernail and a smile upon his lips. Behind her, a woman whispered that the piano had played the same melody on the night Ashcombe buried his wife. Mara turned toward the music room, where the piano lid stood open and rainwater pooled beneath an empty wooden bench. Then, from somewhere upstairs, a woman’s voice called her name, followed by footsteps that stopped directly above the locked room.
created_at"2026-10-27T11:35:04.91Z" 10/27/2026, 11:35:04 AM
model"openai/gpt-6.1-terra-20261026"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4798
moderation_latency(null)
generation_time14088
tokens_prompt46
tokens_completion624
native_tokens_prompt41
native_tokens_completion1171
native_tokens_completion_images0
native_tokens_reasoning925
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"completed"
service_tier"default"
usage0.005896
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer(null)
request_id"req-1793100904-LnjlCvQb3hX97OH67Ek6"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1793100904-eMlRE73aqTn0YHUuMMib"
upstream_id"resp_088ade05d354d9a0016ae08c68ffd487d1b084d68d2fcf097d"
provider_responses
0
endpoint_id"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id"resp_088ade05d354d9a0016ae08c68ffd487d1b084d68d2fcf097d"
is_byokfalse
latency765
model_permaslug"openai/gpt-6.1-terra-20261026"
provider_name"OpenAI"
status200
total_cost0.005896
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920