Run: 2026-09-23-01M36P5JQ9EK287HHJAE82VE5Y

Run Details

Duration:
6.8s
Cost:
$0.000068
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
74.87% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Detective Mara Venn arrived before dawn, carrying yesterday’s rain. The manor’s front door stood open, inviting nobody inside. A dead clock ticked softly beside the entrance hall mirror. On its glass, someone had written her name in blood. Behind her, the chauffeur whispered, “You weren’t expected tonight.” Mara turned; the gravel drive stretched empty beneath moonlight. Then every window upstairs went dark, one after another. Somewhere above, a floorboard creaked beneath an unseen footstep. She counted the seconds, listening for another sound. It came from the locked room directly behind her.
created_at"2026-09-23T08:29:58.895Z" 9/23/2026, 8:29:58 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5556
moderation_latency(null)
generation_time6731
tokens_prompt46
tokens_completion157
native_tokens_prompt41
native_tokens_completion127
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.0000676
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790152198-npCiFJlZrZl50M4F7Ymb"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790152198-LS9QC3zllWBQohilRtbL"
upstream_id"resp_028a24659d88285d016ab38e0703fc87d19ffe97c37c81eaeb"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_028a24659d88285d016ab38e0703fc87d19ffe97c37c81eaeb"
is_byokfalse
latency4289
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0000676
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
74.87% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
09
19
210
310
49
59
69
79
88
99