Run: 2026-04-24-01KQ0P9P72WQJTSY4EG189XN58

Run Details

Duration:
14.0s
Cost:
$0.019765
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain stitched silver threads across Blackwell Manor's windows after midnight. Detective Mara Vale arrived as the grandfather clock stopped suddenly. Inside, candles trembled, revealing muddy footprints along the marble floor. Lord Blackwell lay beneath the portrait, smiling strangely in death. A ruby-handled letter opener pinned his bloodied cravat to carpet. No one screamed; the household waited, listening to rain outside. Mara noticed wax dripped upward on the nearest sconce somehow. She also saw one dinner chair facing the wall alone. From upstairs, a nursery rhyme began in a man's voice. Mara closed the door, knowing the murderer remained inside nearby.
created_at"2026-04-24T21:28:25.065Z" 4/24/2026, 9:28:25 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency11871
moderation_latency(null)
generation_time13868
tokens_prompt46
tokens_completion442
native_tokens_prompt41
native_tokens_completion652
native_tokens_completion_images0
native_tokens_reasoning516
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"
usage0.019765
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_00c387d3cf03cd1c0169ebe07923d48194bfe053b6c93d6064"
is_byokfalse
latency257
model_permaslug"openai/gpt-5.5-20260423"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777066105-Tl0B2Yn9KBBuOcg2NmHv"
session_id(null)
api_type"completions"
id"gen-1777066105-Q28X0MFBqRij3Hq3bJQA"
upstream_id"resp_00c387d3cf03cd1c0169ebe07923d48194bfe053b6c93d6064"
total_cost0.019765
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910