Run: 2026-03-09-01KKACB2T1Q64STXDY16922ABW

Run Details

Duration:
17.5s
Cost:
$0.017593
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 hammered Blackthorn Hall as Inspector Vale arrived, his lantern trembling, while somewhere above, a woman screamed once, then stopped. The butler opened the door already gloved in blood, whispering that dinner had ended abruptly when Lady Harrow died tonight. Inside, twelve guests stood motionless around silver candlesticks, their faces pale masks reflecting lightning and the accusing portrait's stare above. Lady Harrow lay beneath the grandfather clock, emerald necklace broken, one slipper missing, and a chess queen clenched tightly there. Vale noted the locked windows, the undisturbed dust, and the smell of lilacs drifting strangely from the library door nearby. When the clock began striking thirteen, every mourner flinched except the vicar, who smiled as though recognizing fate at once.
created_at"2026-03-09T22:44:01.998Z" 3/9/2026, 10:44:01 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency16499
moderation_latency(null)
generation_time17441
tokens_prompt46
tokens_completion508
native_tokens_prompt41
native_tokens_completion1166
native_tokens_completion_images0
native_tokens_reasoning1002
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"
usage0.0175925
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0df1127389d2bb540169af4d3210cc81959502da6608e4c9fd"
is_byokfalse
latency146
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-1773096241-vFTMN5UvvsqTfM8f0FWu"
upstream_id"resp_0df1127389d2bb540169af4d3210cc81959502da6608e4c9fd"
total_cost0.0175925
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