Run: 2026-09-23-01M36RATYPWAQ3DS6NJ30EX8F2

Run Details

Duration:
15.0s
Cost:
$0.000789
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 bell above the locked library door rang, though nobody had entered since Lord Ashcombe’s funeral that evening. Inspector Vale found the study window latched, its curtains stirring, and one wet footprint beside the hearth, pressed into dust. On the desk, beneath a toppled glass, lay the host’s final note: TRUST NO ONE WHO ARRIVES AFTER ME TONIGHT. The housekeeper crossed herself when Vale asked who had discovered the body, then whispered, “Everyone, Inspector, except the dead man.” Vale glanced toward the staircase, where six guests waited beneath portraits whose painted eyes seemed fixed upon his bloodstained gloves. Then the library bell rang again, and from upstairs came a seventh set of footsteps, descending quietly toward them, unannounced.
created_at"2026-09-23T09:07:48.321Z" 9/23/2026, 9:07:48 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3490
moderation_latency(null)
generation_time14898
tokens_prompt46
tokens_completion762
native_tokens_prompt41
native_tokens_completion1570
native_tokens_completion_images0
native_tokens_reasoning1409
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"
usage0.0007891
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154468-Bf2bl4NSpvJ6SLqb6ue9"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154468-o8tTRYTplDsz6sw8KR28"
upstream_id"resp_02f28594d2c38016016ab396e46a7c87d197fe073ba289cb73"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_02f28594d2c38016016ab396e46a7c87d197fe073ba289cb73"
is_byokfalse
latency669
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0007891
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