Run: 2026-03-18-01KM07HW0CD29QAQCF0RA0PBEZ

Run Details

Duration:
5.3s
Cost:
$0.001209
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
The rain hammered Marrowick Station when Detective Hale arrived, suitcase clutched tight, hearing whispers from Porter's platform below at midnight. A conductor's whistle had stopped abruptly, and silence sat like frost across the empty ticket office windows all around tonight. Behind the luggage shed, someone found the mayor sprawled, throat cut neatly, lantern light pooling around his shoes alone there. Hale knelt without gloves, sniffing iron and cedar, then noticed a cufflink stamped with a raven crest engraved in silver. Three suspects hovered nearby: Porter's brother, the skeptical nurse, and Councilman Voss with muddy boots fresh from tracks outside town. Each insisted innocence, yet their stories tangled around a missing key said to open the freight vault by dawn yesterday. Hale requested names again, watching how the nurse avoided rainwater stains on the railings near the stairs most carefully then. When lightning flared, the ravens on the cufflink seemed to twitch, as if still listening for the next footstep coming.
created_at"2026-03-18T10:23:39.035Z" 3/18/2026, 10:23:39 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4664
moderation_latency(null)
generation_time5154
tokens_prompt46
tokens_completion269
native_tokens_prompt41
native_tokens_completion961
native_tokens_completion_images0
native_tokens_reasoning744
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"
usage0.00120945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_00c4e11fa870f9ed0169ba7d2b199881968b5008afec5addcd"
is_byokfalse
latency243
model_permaslug"openai/gpt-5.4-nano-20260317"
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-1773829419-YujVfmr3tSBCu10TpURB"
upstream_id"resp_00c4e11fa870f9ed0169ba7d2b199881968b5008afec5addcd"
total_cost0.00120945
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