Run: 2026-09-23-01M36NVBWFTDZAE2YW0AEYFRAX

Run Details

Duration:
14.2s
Cost:
$0.000700
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 other clock in town continued counting toward morning without explanation. Mara Venn found the stationmaster face down beneath the timetable, one gloved hand clutching a ticket dated exactly tomorrow morning. Rain tapped the skylights, and somewhere in the locked building a telephone rang three times before falling silent without answer. Mara checked the doors; each was bolted from inside, and the stationmaster’s wet coat hung neatly beside the entrance door. She turned the ticket over and found her own name printed beneath a destination no train had served in decades. Behind her, the station clock began ticking backward, while the dead man’s pocket watch continued advancing toward midnight steadily, inexorably. Then the stationmaster’s eyes opened, and he whispered, “Don’t let the conductor see you,” before dying for the second time.
created_at"2026-09-23T08:24:24.215Z" 9/23/2026, 8:24:24 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13108
moderation_latency(null)
generation_time14156
tokens_prompt46
tokens_completion239
native_tokens_prompt41
native_tokens_completion1392
native_tokens_completion_images0
native_tokens_reasoning1209
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"
usage0.0007001
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790151864-72mwdI45OkVcfWwKyHos"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790151864-fv3VMeXSqo3bRO2J9Tht"
upstream_id"resp_0dc4a6895d59c88c016ab38cb8509887d1a293063074f8ab2f"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0dc4a6895d59c88c016ab38cb8509887d1a293063074f8ab2f"
is_byokfalse
latency590
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0007001
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
sentences7
wordCounts
020
120
220
320
420
520
620