Run: 2026-03-18-01KM0A2N3E970DG41REX0T38D1

Run Details

Duration:
4.5s
Cost:
$0.001103
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 polished Marrowick Pier until lamplight shimmered like evidence, and everyone pretended not to notice the body there tonight. Captain Ellery Graves stood rigid, watching constables circle, while his niece insisted the scream came from inside the warehouse earlier. Detective Mara Voss arrived with a notebook, smelling of smoke, and asked who had keys to the dock shed first. Beneath the overturned boat, the victim wore a silver signet, yet no one recalled the owner before this storm began. Only Dr. Lorne Sable offered a timeline, claiming he treated Graves days ago for bruised hands at midnight quietly too. Mara lifted the signet carefully, noticing a fresh scratch shaped like a hook on slate beside the victim's cold thumb.
created_at"2026-03-18T11:07:46.171Z" 3/18/2026, 11:07:46 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3931
moderation_latency(null)
generation_time4349
tokens_prompt46
tokens_completion192
native_tokens_prompt41
native_tokens_completion876
native_tokens_completion_images0
native_tokens_reasoning710
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"
usage0.0011032
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_07dc7a47f8f6ac0a0169ba8782405c81979484b8b03f7be5d5"
is_byokfalse
latency204
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-1773832066-URBv5ZooJoOXyRPaxC9Y"
upstream_id"resp_07dc7a47f8f6ac0a0169ba8782405c81979484b8b03f7be5d5"
total_cost0.0011032
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