Run: 2026-09-23-01M36R73DG44N77J4G61FFKHSX

Run Details

Duration:
13.6s
Cost:
$0.000619
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 clock above Bellweather Station stopped, though every witness swore its hands had continued moving through the storm. Detective Mara Venn arrived carrying no umbrella, her coat dry, her expression colder than the rain outside the locked doors. Inside, the stationmaster lay beneath the timetable, one gloved hand clutching a ticket dated tomorrow morning, marked in red ink. Nobody admitted seeing him enter, yet fresh footprints crossed the platform and ended abruptly beside Mara’s shoes without continuing farther. Mara studied them, recognizing the narrow heel marks from a pair of boots she had buried beneath her childhood home. Then the station clock struck thirteen, and somewhere beneath the platform, a dead man answered with three measured knocks softly.
created_at"2026-09-23T09:05:45.913Z" 9/23/2026, 9:05:45 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9445
moderation_latency(null)
generation_time13558
tokens_prompt46
tokens_completion490
native_tokens_prompt41
native_tokens_completion1229
native_tokens_completion_images0
native_tokens_reasoning1072
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"
usage0.0006186
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154345-mOoJUt0A6c5YbVvRELDA"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154345-sW7piamMjDrNNCq338vE"
upstream_id"resp_071c6e33e9d04ff3016ab3966a08fc87d1bbaffe76f059301f"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_071c6e33e9d04ff3016ab3966a08fc87d1bbaffe76f059301f"
is_byokfalse
latency804
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0006186
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
sentences6
wordCounts
020
120
220
320
420
520