Run: 2026-02-16-01KHKAWJSDE3ZWQFWXFSRM68C2

Run Details

Model:
GPT-5 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
15.2s
Cost:
$0.000643
Provider:
OpenAI

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain hammered the city as midnight shadows stretched inward. A candle guttered in the foyer, revealing a lifeless silhouette. The clock trembled, its hands stalled on a cruel minute. Silence pressed against the room, save for muffled breaths outside. Detective Mara stepped inside, cataloging whispers with practiced, wary calm. A note lay folded near the victim, ink still damp.
created_at"2026-02-16T13:40:40.754884+00:00" 2/16/2026, 1:40:40 PM
model"openai/gpt-5-nano-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1855
moderation_latency(null)
generation_time15088
tokens_prompt46
tokens_completion783
native_tokens_prompt41
native_tokens_completion1603
native_tokens_completion_images0
native_tokens_reasoning1472
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"
usage0.00064325
router(null)
provider_responses
0
id"resp_08de7bc1543a36280169931e4892d881948dd0254a475e742e"
status200
is_byokfalse
latency121
endpoint_id"50329d77-04e1-4979-a184-c33030289476"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-nano-2025-08-07"
api_type"completions"
id"gen-1771249224-iW8iLNpIoPfhMatHc7AY"
upstream_id"resp_08de7bc1543a36280169931e4892d881948dd0254a475e742e"
total_cost0.00064325
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
010
110
210
310
410
510