Run: 2026-03-06-01KK1GDWWF84K9TBVMHWVCZ6D0

Run Details

Model:
GPT-5.4
Duration:
4.8s
Cost:
$0.002352
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
65.92% 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 hammered Blackthorn Manor as guests arrived shivering, unaware that before dawn one among them would lie murdered upstairs. At supper, silver gleamed beneath candlelight while Lady Vale smiled too brightly, concealing dread behind practiced laughter and jeweled fingers. A telegram rested unopened beside her plate, its sender unnamed, its message heavy enough to silence every servant nearby. When the clock struck nine, the library doors swung open, and Colonel Ashcroft entered carrying mud, whiskey, and fear. No one noticed the missing portrait then, nor the faint red smear darkening the banister toward the locked east wing. Only the butler paused, listening hard, as something soft thudded overhead and the chandelier trembled above their wine.
created_at"2026-03-06T12:02:18.646Z" 3/6/2026, 12:02:18 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency514
moderation_latency(null)
generation_time4740
tokens_prompt46
tokens_completion193
native_tokens_prompt41
native_tokens_completion150
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)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0023525
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_05ea8e4496fe27210169aac24ab4c8819496214c4247eadcbb"
is_byokfalse
latency154
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-1772798538-QZkuoVSH0vwUxwBTOmLC"
upstream_id"resp_05ea8e4496fe27210169aac24ab4c8819496214c4247eadcbb"
total_cost0.0023525
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
65.92% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
120
219
319
420
518