Run: 2026-02-16-01KHK9S9X7DT0QCJE07B7KHVQE

Run Details

Model:
GPT-5 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
21.0s
Cost:
$0.000599
Provider:
OpenAI

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain whispered over cobblestones. An umbrella trembled beneath streetlamps. A note fluttered from balcony. Neighbors gathered behind closed shutters. Sirens hummed beyond the river. A body slept beneath lamplight. The killer wore careful patience. Every clue disguised another secret. Night pressed hard against windows. The city listened without judgment. Detective Maren traced muffled footsteps. Her notebook trembled with questions.
created_at"2026-02-16T13:21:30.039293+00:00" 2/16/2026, 1:21:30 PM
model"openai/gpt-5-nano-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3063
moderation_latency(null)
generation_time20833
tokens_prompt46
tokens_completion762
native_tokens_prompt41
native_tokens_completion1492
native_tokens_completion_images0
native_tokens_reasoning1344
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"
usage0.00059885
router(null)
provider_responses
0
id"resp_07233f681743d8f801699319c4982481959b5d5d53cead25f7"
status200
is_byokfalse
latency111
endpoint_id"50329d77-04e1-4979-a184-c33030289476"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-nano-2025-08-07"
api_type"completions"
id"gen-1771248068-bbElPRjw2BKSY7VS3uYF"
upstream_id"resp_07233f681743d8f801699319c4982481959b5d5d53cead25f7"
total_cost0.00059885
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115