Run: 2026-03-06-01KK1HKTJKVDZ4Y8SNJ6M60CN8

Run Details

Model:
GPT-5.4
Duration:
4.4s
Cost:
$0.002083
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 clawed the stained windows of Blackthorn Hall as guests gathered silently, pretending civility while old grudges sharpened behind smiles. At the stroke of eight, Lady Wren descended the staircase glittering in emerald silk, her diamond necklace resting above secrets. No one noticed the missing portrait until thunder cracked overhead, and the candles guttered low, smearing every face with dread. Then came the scream from the library, raw and brief, followed by silence so complete even the storm paused outside. When they forced the door, Lord Ashcombe lay across the hearthrug, eyes open, throat dark, one hand clutching torn velvet.
created_at"2026-03-06T12:23:01.466Z" 3/6/2026, 12:23:01 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency511
moderation_latency(null)
generation_time4376
tokens_prompt46
tokens_completion164
native_tokens_prompt41
native_tokens_completion132
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"
usage0.0020825
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0ec8ed0bd1eb27dd0169aac7258cd881939e25fb95d1ffeb72"
is_byokfalse
latency240
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-1772799781-srXzjz09YGSS4DcQBQXF"
upstream_id"resp_0ec8ed0bd1eb27dd0169aac7258cd881939e25fb95d1ffeb72"
total_cost0.0020825
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420