Run: 2026-03-06-01KK1HXPW8ZXDVRAMSE8GSB9W5

Run Details

Duration:
4.3s
Cost:
$0.002128
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
59.10% 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 polished the manor windows while mourners gathered below, pretending grief, hiding calculations, and watching the grandfather clock refuse midnight. When Lady Haverford collapsed beside the champagne fountain, nobody screamed immediately; surprise lingered first, sharp as cut crystal. Inspector Vale arrived through the storm, noting muddy footprints, extinguished candles, and one silver cufflink glinting beneath velvet drapery. Upstairs, a locked music room concealed discordant violin notes, while downstairs every guest rehearsed alibis with suspiciously careful breathing. Vale studied their faces and saw something worse than panic: relief, quickly masked behind condolences, trembling hands, and lies.
created_at"2026-03-06T12:28:25.36Z" 3/6/2026, 12:28:25 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency441
moderation_latency(null)
generation_time4277
tokens_prompt46
tokens_completion182
native_tokens_prompt41
native_tokens_completion135
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"
usage0.0021275
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_066b3d4513fe64800169aac8696b60819681645edb23544a20"
is_byokfalse
latency171
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-1772800105-ZZisg7D8EOMuXDqBMCri"
upstream_id"resp_066b3d4513fe64800169aac8696b60819681645edb23544a20"
total_cost0.0021275
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
59.10% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
118
219
319
419