Run: 2026-07-09-01KX4182HDYV14A8XNZDBBM5NK

Run Details

Duration:
4.6s
Cost:
$0.004225
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
84.26% 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
Rain polished the manor windows while Inspector Vale counted thirteen guests and noticed one chair remained conspicuously empty beside him. At midnight, the grandfather clock coughed twice, stopped, and revealed blood creeping silently beneath the locked library door before them. Nobody moved until Lady Ashcombe whispered that her husband possessed the only key, hanging inside his waistcoat pocket that very evening. Vale opened the door and found Lord Ashcombe seated upright, smiling faintly, with no wound except a blackened fingertip visible. On the desk, twelve untouched champagne glasses surrounded a thirteenth glass, still warm, bearing Inspector Vale's unmistakable engraved initials beneath it.
created_at"2026-07-09T18:11:40.726Z" 7/9/2026, 6:11:40 PM
model"openai/gpt-5.6-sol-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency455
moderation_latency(null)
generation_time4566
tokens_prompt46
tokens_completion184
native_tokens_prompt41
native_tokens_completion134
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"
usage0.004225
router(null)
provider_responses
0
endpoint_id"a54c5de0-89bf-4ad7-a212-cf977eed918a"
id"resp_03bf174f8688f8f7016a4fe45ccaf88194a86321a75adf34e3"
is_byokfalse
latency193
model_permaslug"openai/gpt-5.6-sol-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620700-JXwMALGLpihagzecULOI"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620700-luDQoElzn1UiuhEloQVY"
upstream_id"resp_03bf174f8688f8f7016a4fe45ccaf88194a86321a75adf34e3"
total_cost0.004225
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
84.26% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
221
320
421