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Run: 2026-02-16-01KHKA1MNFAZ14G2V33T3DS1S2
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
34.8s
Cost:
$0.006194
Provider:
OpenAI
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
Messages
Meta
AI
Rain hissed against the fogged windows while a clock in the hallway struck midnight with indifferent, metallic patience and secrets. On the rug beneath the chandelier, a crimson stain bloomed like a vulgar flower, dark and impossibly deliberate this morning. Detective Marlowe arrived wearing an overcoat still damp from the storm, eyes tired, hands shoved into pockets and cigarette smoke. He swallowed the night like medicine, examined the room with professional hunger, cataloguing alibis and small conflicting truths and lies. A woman in mourning sat perfectly still by the piano, fingers white around glass, lips pressed to a memory only. Guests lingered in corners, pretending conversation, relishing scandalous whispers, shifting like restless moths around the corpse's dim glow and suspicion. A single neighbor claimed he heard raised voices, then a peculiar silence, the kind that settles before impossible things tonight. Footsteps led away toward an iron gate squeaking like an accusation, leaving muddy prints and a scent of lavender always. The victim's hand still clutched a torn letter, ink bleeding like a failing pulse, the signature scrawled in haste yesterday. Marlowe's assistant waited by the doorway, a small man with a notebook of questions and a tendency to cry often.
created_at
"2026-02-16T13:26:17.234337+00:00"
2/16/2026, 1:26:17 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2135
moderation_latency
(null)
generation_time
34638
tokens_prompt
46
tokens_completion
1074
native_tokens_prompt
41
native_tokens_completion
3092
native_tokens_completion_images
0
native_tokens_reasoning
2816
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
usage
0.00619425
router
(null)
provider_responses
0
id
"resp_07a3a0362943a8320169931ad5bf848194a69ab06cc6295bd1"
status
200
is_byok
false
latency
120
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771248341-u4EtoGCaIZjdLQHcU4DA"
upstream_id
"resp_07a3a0362943a8320169931ad5bf848194a69ab06cc6295bd1"
total_cost
0.00619425
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20