Run: 2026-03-09-01KK9QDP3AENH396EB25PPBV4D

Run Details

Duration:
27.8s
Cost:
$0.025077
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
Rain worried the stained windows of Blackthorn Manor as Inspector Vale arrived, hat dripping, and found every curtain tightly drawn. In the candlelit hall, seven guests watched the grandfather clock shudder toward midnight while thunder covered a woman's strangled cry. Vale followed the sound into the library, where Lord Ashcombe lay beside the hearth, silver opener lodged beneath his breastbone. No window stood open, no servant had entered, and the only key rested calmly in the dead man's pocket tonight. On the mantel, beneath a smiling family portrait, melted wax pinned a single black rose to yesterday's evening invitation card. Vale removed his gloves, studied the unmoving faces, and knew the storm outside was kinder than anyone remaining inside tonight.
created_at"2026-03-09T16:38:27.188Z" 3/9/2026, 4:38:27 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency26549
moderation_latency(null)
generation_time27640
tokens_prompt46
tokens_completion435
native_tokens_prompt41
native_tokens_completion1665
native_tokens_completion_images0
native_tokens_reasoning1514
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0250775
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0b7e2c054c4485a00169aef7835cc0819092ffff7e64515551"
is_byokfalse
latency319
model_permaslug"openai/gpt-5.4-20260305"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773074307-rMkPxPB6GF1shXcQpwrW"
upstream_id"resp_0b7e2c054c4485a00169aef7835cc0819092ffff7e64515551"
total_cost0.0250775
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520