Run: 2026-09-23-01M36R8B5JX4NVKMKQFWCVHFGF

Run Details

Duration:
26.4s
Cost:
$0.001384
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 observatory doors swung open, though everyone in Bellweather knew its keeper had been dead for three hours. Inspector Vale stepped inside, carrying a rain-soaked hat and the uncomfortable certainty that the murderer had waited for him there. The body lay beneath the chart, one hand curled around a silver key belonging to no door in the building. Rain tapped the dome overhead while twelve silent witnesses watched from portraits lining the circular walls above the dusty instruments. Among them, the mayor smiled faintly, though Vale remembered seeing that same expression at the victim’s funeral only last week. A clock struck one, and behind the sealed library door, a disconnected telephone began ringing without warning in the darkness. Nobody moved until the dead keeper’s watch answered from inside Vale’s coat, chiming a melody he had never heard before.
created_at"2026-09-23T09:06:26.62Z" 9/23/2026, 9:06:26 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency24253
moderation_latency(null)
generation_time26331
tokens_prompt46
tokens_completion227
native_tokens_prompt41
native_tokens_completion2759
native_tokens_completion_images0
native_tokens_reasoning2588
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"
usage0.0013836
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154386-Ka9yiekeRtAILIwwp2Wi"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154386-nKHY3iDmHQ86mlOz5cTt"
upstream_id"resp_0d9aff9d2b79f065016ab39692c33887d18fe824928011f024"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0d9aff9d2b79f065016ab39692c33887d18fe824928011f024"
is_byokfalse
latency972
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0013836
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