Run: 2026-07-09-01KX417BR9P22KJRBKA7F99ZZ2

Run Details

Duration:
1.8s
Cost:
$0.000731
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
86.73% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain tapped against Blackwood Manor. Detective Vale arrived before midnight. Every window glowed with candlelight. Inside, someone had stopped breathing. The parlor clock announced twelve chimes. Lady Ashcombe lay beneath portraits. Crimson silk concealed a silver dagger. Her fingers clutched a torn photograph. The doors were locked from inside. No footprints crossed the polished floor. Vale studied every frightened face. Four guests avoided his steady gaze. A fifth guest was missing entirely. Then the fireplace whispered someone's name. The candles suddenly flickered and died.
created_at"2026-07-09T18:11:17.395Z" 7/9/2026, 6:11:17 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency894
moderation_latency(null)
generation_time1582
tokens_prompt46
tokens_completion171
native_tokens_prompt41
native_tokens_completion115
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"
usage0.000731
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_048f120ddf4fea15016a4fe445b1108196aa0ce954f7bbbff7"
is_byokfalse
latency420
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-1783620677-Oesm6FjI9rDqob29cIHw"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620677-wzXclSF4bkGXWz2FxIdz"
upstream_id"resp_048f120ddf4fea15016a4fe445b1108196aa0ce954f7bbbff7"
total_cost0.000731
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
86.73% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
05
15
25
35
46
55
66
76
86
96
105
116
126
136
146