Run: 2026-03-09-01KK9PSKQ46FT84QF86XV5GPKD

Run Details

Duration:
27.0s
Cost:
$0.027162
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
94.38% 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 needled the manor windows as Inspector Vale arrived, summoned before dawn by a trembling footman who refused entering alone. In the library, the clock had stopped at three, and Lady Harrow lay beside the hearth, smiling unnaturally in death. A chessboard waited on the table, black queen toppled, while six untouched glasses caught lightning like accusing eyes that night. No door stood open, no window unlatched, yet mud glistened across the Persian rug in deliberate, inward footsteps from outside. Vale removed his gloves, noticing the victim's wedding ring missing, though a pale band remained upon her finger still visible. Then the butler whispered that everyone in the house had heard the scream, and nobody admitted hearing it twice tonight. Vale looked again at Lady Harrow's smile and understood, with sudden dread, that someone had posed her after death.
created_at"2026-03-09T16:27:29.591Z" 3/9/2026, 4:27:29 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency25316
moderation_latency(null)
generation_time26605
tokens_prompt46
tokens_completion512
native_tokens_prompt41
native_tokens_completion1804
native_tokens_completion_images0
native_tokens_reasoning1617
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"
usage0.0271625
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_03bd239c1dcbd45d0169aef4f1c0e8819692971854dbf145ff"
is_byokfalse
latency193
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-1773073649-LQqOiWW65Y0C3rTJEL5M"
upstream_id"resp_03bd239c1dcbd45d0169aef4f1c0e8819692971854dbf145ff"
total_cost0.0271625
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
94.38% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
619