Run: 2026-07-09-01KX40TF60EMJ4MBPZRQVA8CEW

Run Details

Duration:
3.7s
Cost:
$0.000545
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
95.68% 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 hammered Blackthorn Manor, muting every clock within its walls. At midnight, Eleanor Vane discovered blood beneath the library window. Her husband’s silver watch lay shattered beside the crimson footprints. Outside, the locked garden gate groaned without any visible hand. Eleanor called downstairs, but only silence answered from below. Then someone whispered her name through the darkness behind her.
created_at"2026-07-09T18:04:14.921Z" 7/9/2026, 6:04:14 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency448
moderation_latency(null)
generation_time3690
tokens_prompt46
tokens_completion109
native_tokens_prompt41
native_tokens_completion84
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"
usage0.000545
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_04bbb90e4945f968016a4fe29efc0881948038266f28896479"
is_byokfalse
latency290
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-1783620254-twFDmdTOVcJcVNATOevv"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620254-B17qgMYfP7XkVRbO3T94"
upstream_id"resp_04bbb90e4945f968016a4fe29efc0881948038266f28896479"
total_cost0.000545
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
95.68% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
010
110
210
310
49
510