Run: 2026-07-09-01KX40YBYXKZBW3CPVQSK56J9Y

Run Details

Duration:
7.4s
Cost:
$0.007757
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain silvered Blackthorn Manor as Detective Vale arrived before dawn. Inside, the grandfather clock had stopped precisely at midnight somehow. A thin smear of blood marked the polished entrance floor. Vale noticed muddy footprints leading toward the locked library door. Behind it, someone whispered his name, then abruptly fell silent. He tested the handle, discovering fresh scratches around the keyhole. From upstairs came one sharp cry, followed by absolute silence. The housekeeper appeared pale, clutching a silver serving tray tightly. She claimed nobody entered, yet mud darkened her slippers overnight. Vale asked where the victim was, and everyone looked upstairs. Then the library door creaked open without anyone touching it. A bloodstained glove slid across the threshold toward Vale silently.
created_at"2026-07-09T18:06:22.695Z" 7/9/2026, 6:06:22 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2091
moderation_latency(null)
generation_time7211
tokens_prompt46
tokens_completion622
native_tokens_prompt41
native_tokens_completion1286
native_tokens_completion_images0
native_tokens_reasoning1120
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"
usage0.007757
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_027e87648ed5b1f6016a4fe31ec3688190a7a5821465cac8eb"
is_byokfalse
latency207
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-1783620382-oLnd569C5dVw35ict2Vx"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620382-aq6Jj9gcFF1hBYpJgkn2"
upstream_id"resp_027e87648ed5b1f6016a4fe31ec3688190a7a5821465cac8eb"
total_cost0.007757
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110