Run: 2026-07-09-01KX40J23PD1NEYJBZWWFYE0AA

Run Details

Duration:
1.4s
Cost:
$0.000803
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
94.24% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain tapped softly against windows overlooking Blackthorn Manor's empty courtyard. Detective Mara Voss arrived before dawn, carrying yesterday's newspaper. Inside, every clock had stopped precisely at midnight, together. A silver bell chimed upstairs, though nobody touched its handle. Mara found Lord Vale beneath portraits, smiling without his eyes. His blood darkened the carpet, forming an unfamiliar crooked arrow. Beside him lay one white glove, stitched with initials backward. The household gathered silently, each face concealing a private thunder. Then Mara noticed wet footprints leading toward the locked library.
created_at"2026-07-09T17:59:39.389Z" 7/9/2026, 5:59:39 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency434
moderation_latency(null)
generation_time1277
tokens_prompt46
tokens_completion167
native_tokens_prompt41
native_tokens_completion127
native_tokens_completion_images0
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"completed"
service_tier"default"
usage0.000803
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_092e2c3bd8913591016a4fe18b728c81938b52472b467fc9c4"
is_byokfalse
latency272
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783619979-3RtKM43oKMadnEqpveHV"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619979-LQuoAAXYvVcsg7iSMDKk"
upstream_id"resp_092e2c3bd8913591016a4fe18b728c81938b52472b467fc9c4"
total_cost0.000803
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
94.24% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
010
19
29
310
410
510
610
710
810