Run: 2026-02-16-01KHK9K2Z9ZSEAS9Z2NH76T98P

Run Details

Model:
GPT-5 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
20.9s
Cost:
$0.000813
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
Fog clung to the harbor. A streetlamp trembled above cobbles. A gull shrieked, startling strangers. A body lay unseen nearby. The clock hissed, minutes ticking. Rumors of murder haunted alleys. Detective Arden stepped into shadows. Breath fogged faces at dawn. A notebook opened, revealing questions. The town held its breath.
created_at"2026-02-16T13:18:06.140021+00:00" 2/16/2026, 1:18:06 PM
model"openai/gpt-5-nano-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2899
moderation_latency(null)
generation_time20732
tokens_prompt46
tokens_completion727
native_tokens_prompt41
native_tokens_completion2028
native_tokens_completion_images0
native_tokens_reasoning1920
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"
usage0.00081325
router(null)
provider_responses
0
id"resp_0ee748cb55003e4901699318f8ef54819597a15384ad22a38f"
status200
is_byokfalse
latency194
endpoint_id"50329d77-04e1-4979-a184-c33030289476"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-nano-2025-08-07"
api_type"completions"
id"gen-1771247864-7IYqI1iRAGAwHjsJbgzO"
upstream_id"resp_0ee748cb55003e4901699318f8ef54819597a15384ad22a38f"
total_cost0.00081325
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
05
15
25
35
45
55
65
75
85
95