Run: 2026-09-23-01M36NWZG8C9SQQ192AGCSQ8E4

Run Details

Duration:
3.6s
Cost:
$0.000068
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
30.83% 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, Detective Mara Voss found the mayor face down in the fountain, clutching a bloodstained invitation beneath moonlit water. Rain stitched silver threads across the square while the clocktower chimed thirteen, and every window above watched silently. She recognized the dead man’s ring, yet someone had twisted it backward, hiding the family crest from view. Behind her, a child whispered, “He promised nobody would remember,” then vanished into the crowd before Mara turned. The invitation bore tomorrow’s date, her own name, and one sentence written in the mayor’s unmistakable crimson ink.
created_at"2026-09-23T08:25:17.069Z" 9/23/2026, 8:25:17 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2275
moderation_latency(null)
generation_time3569
tokens_prompt46
tokens_completion158
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-1790151917-ERAne9jHuPEjVfi1dsYZ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790151917-1KZy3fujN0XF0SOA3Ygu"
upstream_id"resp_02614d10f0fadde8016ab38ced2f1887d1aca3b0aaa824c5a1"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_02614d10f0fadde8016ab38ced2f1887d1aca3b0aaa824c5a1"
is_byokfalse
latency808
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
30.83% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
118
218
318
418