Run: 2026-07-09-01KX40R0MEQA6YMJBK1MBEBZZ0

Run Details

Duration:
15.8s
Cost:
$0.045115
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
At midnight, the grandfather clock stopped, and Lady Harrow's scream sliced through Blackthorn Manor's locked and listening halls without warning. Inspector Vale arrived before dawn, carrying one umbrella, two notebooks, and a private fear of rooms without windows or exits. The victim sat upright in the library, smiling faintly, while fresh snow covered every door and footprint outside completely overnight. A silver key rested upon his tongue, engraved with tomorrow's date and stained by neither blood nor tarnish at all. Beside him, seven candles burned blue, although the grate was cold and every window had been nailed shut from inside. The household gathered silently, each servant wearing black gloves, each relative denying they had heard the fatal scream upstairs earlier. Then the dead man's pocket watch began ticking backward, while someone behind Inspector Vale whispered that it knew his name. Vale turned, but only a portrait faced him, its painted eyes newly closed beneath a veil of glistening silver frost.
created_at"2026-07-09T18:02:54.487Z" 7/9/2026, 6:02:54 PM
model"openai/gpt-5.6-sol-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14826
moderation_latency(null)
generation_time15548
tokens_prompt46
tokens_completion269
native_tokens_prompt41
native_tokens_completion1497
native_tokens_completion_images0
native_tokens_reasoning1298
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"
usage0.045115
router(null)
provider_responses
0
endpoint_id"a54c5de0-89bf-4ad7-a212-cf977eed918a"
id"resp_010793bd82549301016a4fe24e918c819692cc2e541716e10d"
is_byokfalse
latency260
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-1783620174-1ilOC4oKffJ8XbRu8oSZ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620174-LvAi12iEe1mUjP15IWXl"
upstream_id"resp_010793bd82549301016a4fe24e918c819692cc2e541716e10d"
total_cost0.045115
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
sentences8
wordCounts
020
120
220
320
420
520
620
720