Run: 2026-09-23-01M37J1E6Y19FE6212EV9273H4

Run Details

Duration:
25.5s
Cost:
$0.019202
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
At midnight, the village clock struck thirteen, and Detective Mara Voss found blood seeping beneath the locked oak library door. The librarian had vanished, leaving one wet footprint, a shattered teacup, and a note addressed to whoever arrived there first. Mara unfolded the paper with gloved fingers, expecting a confession, but found only tomorrow's date written in thin red ink. Behind her, Constable Bell whispered that the library had been empty when he checked its windows just ten minutes earlier. Then someone knocked from inside the locked room, three slow taps followed by the unmistakable scrape of dragging heavy furniture. Bell reached for his keys, but Mara stopped him when a voice behind the door called her forgotten childhood name. No one in the village knew that name, not even Bell, who had served beside her for seven long years. Mara turned the key, and the door swung inward before she touched it, releasing the sharp smell of fresh rain. Inside, the librarian lay beneath the desk, while Mara's own reflection smiled quietly from the tall, darkened window behind him.
created_at"2026-09-23T16:37:03.336Z" 9/23/2026, 4:37:03 PM
model"openai/gpt-6-sol-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency23678
moderation_latency(null)
generation_time25407
tokens_prompt46
tokens_completion273
native_tokens_prompt41
native_tokens_completion1912
native_tokens_completion_images0
native_tokens_reasoning1690
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"
usage0.019202
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790181423-P817rQxZAZAg777ToK5x"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790181423-ybTJscYSPNsKgMtVEn67"
upstream_id"resp_0dca31e91ebc0651016ab4002f77fc87d191f2b4ab298daaab"
provider_responses
0
endpoint_id"1cfc7d9d-4404-4b8e-9ee4-58ae45c9dcd4"
id"resp_0dca31e91ebc0651016ab4002f77fc87d191f2b4ab298daaab"
is_byokfalse
latency1692
model_permaslug"openai/gpt-6-sol-20260922"
provider_name"OpenAI"
status200
total_cost0.019202
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
sentences9
wordCounts
020
120
220
320
420
520
620
720
820