Run: 2026-09-23-01M36NTD83CEN6DSBWZ2A3BSNJ

Run Details

Duration:
13.8s
Cost:
$0.000608
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 passenger swore they had heard it strike thirteen again tonight. Detective Mara Venn arrived carrying a wet umbrella, a sealed warrant, and the certainty someone had summoned her too late. Inside the room, twelve strangers stood around a man whose throat was untouched, yet whose shadow lay facedown beneath him. His ticket named no destination, his pockets held seawater, and the stationmaster insisted the dead man had boarded without witnesses. Mara crouched beside the corpse and noticed one fresh footprint in dust, pointing away from every door in the room. Then the clock began ticking backward, and all twelve strangers turned toward Mara as though expecting her to explain why. She recognized the footprint’s narrow heel immediately; it matched the impression she had left beside her own bed that morning.
created_at"2026-09-23T08:23:52.841Z" 9/23/2026, 8:23:52 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency12708
moderation_latency(null)
generation_time13797
tokens_prompt46
tokens_completion227
native_tokens_prompt41
native_tokens_completion1208
native_tokens_completion_images0
native_tokens_reasoning1034
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"
usage0.0006081
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790151832-0VeXxUa5p1ONFfr0Eq6k"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790151832-D6308Jp0vcvH5E3TL7rI"
upstream_id"resp_035227a0be7facaa016ab38c98f2b887d19eaf14e01b2aad60"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_035227a0be7facaa016ab38c98f2b887d19eaf14e01b2aad60"
is_byokfalse
latency1262
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0006081
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