Run: 2026-03-09-01KKAC8P9GGMZHF7WN1KBNCCXT

Run Details

Duration:
15.9s
Cost:
$0.016287
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 windows of Blackthorn Hall as guests arrived dripping, unaware the evening would end with one chair empty. At precisely eight, Lady Vale welcomed them smiling, her pearls luminous against mourning silk, while thunder rehearsed beyond the cliffs. Detective Elias Ward attended reluctantly, summoned for dinner not duty, yet noting every handshake, hesitation, and glance toward locked doors. The host, Professor Bell, raised a crystal glass to absent friends, though his gaze lingered longest on the returned widow. Candles bent in sudden drafts, silver chimed softly, and somewhere above them a floorboard creaked like a cautious confession overhead. When the lamps failed, darkness entered eagerly, and a single gunshot cracked the room apart like splitting winter ice cleanly. Light returned to reveal Professor Bell collapsed beside the fireplace, his glass shattered, his shirtfront blossoming with impossible red blood. Nobody moved until Ward stooped beside the body, then looked up grimly, certain everyone present had already begun lying beautifully.
created_at"2026-03-09T22:42:43.641Z" 3/9/2026, 10:42:43 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14394
moderation_latency(null)
generation_time15788
tokens_prompt46
tokens_completion554
native_tokens_prompt41
native_tokens_completion1079
native_tokens_completion_images0
native_tokens_reasoning865
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"
usage0.0162875
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0c3c927724be735b0169af4ce3b7088194a3588beb06a0923c"
is_byokfalse
latency223
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-1773096163-jOYnxe5j4gPuePz9Jwk7"
upstream_id"resp_0c3c927724be735b0169af4ce3b7088194a3588beb06a0923c"
total_cost0.0162875
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

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