Run: 2026-07-09-01KX40RVEKT74SE7G91Y84E7MN

Run Details

Duration:
1.6s
Cost:
$0.000803
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
97.12% 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
Rain whispered against Blackwood Manor's windows that moonless November evening. Detective Mara Voss arrived carrying photographs, gloves, and unanswered questions. Inside, servants gathered silently beneath portraits watching everything unfold. A grandfather clock stopped precisely at twelve seventeen that night. Professor Alden Crane lay beneath it, smiling without his eyes. His right hand clutched a bloodstained key from nowhere nearby. No doors stood locked, yet nobody could explain his death. Mara noticed fresh mud surrounding every chair except one nearby. Then someone upstairs began slowly playing the dead professor's violin.
created_at"2026-07-09T18:03:21.953Z" 7/9/2026, 6:03:21 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency415
moderation_latency(null)
generation_time1440
tokens_prompt46
tokens_completion170
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"
usage0.000803
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_00b4ec5633d8e72e016a4fe26a0dd48190bff3be0e552bdf20"
is_byokfalse
latency250
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620201-FKFXVEtpnqIv78PoePlw"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620201-yZMRgq57SCwueYsZbI0o"
upstream_id"resp_00b4ec5633d8e72e016a4fe26a0dd48190bff3be0e552bdf20"
total_cost0.000803
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
97.12% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
010
110
29
310
410
510
610
710
810