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Run: 2026-02-16-01KHKA5NW874VGNJH3VGSEW48N
Run Details
Model:
GPT-5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
32.7s
Cost:
$0.025501
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 stitched the harbor in silver threads as Detective Mira Lorne arrived, late, her notebook damp and resolve undimmed tonight. Behind the fishmonger stalls, a siren moaned, gulls scattering as uniformed boots converged on Slip Nine, already cordoned with tape. The body lay half-hidden beneath burlap, a pale hand pointing seaward, wedding band gleaming like a stranded lighthouse at midnight. Mira crouched, listening to rain tick the pier's ribs, while whispers eddied from shadows where dockworkers smoked, watching her silently. Officer Patel cleared his throat, voice low, saying the caller was anonymous, the message garbled, the location unmistakably precise tonight. She traced bruises already blooming beneath the wrist, noting rope impressions, tar smudges, and faint glitter like ground glass everywhere. From the darkness, a clock tolled two, and the harbor answered with clanks, chains gossiping against hulls, secrets unsettled beneath. A receipt in the coat pocket named Rook's Bar, timestamped earlier, scrawled with a meeting time and one initial only. Patel mentioned fishermen heard arguing between storms, a woman's laugh turning sharp, then silence, then something heavy meeting wood hard. Mira pocketed the receipt, lifted her eyes, and saw footprints dissolving, leading nowhere, except straight toward the black, patient water.
created_at
"2026-02-16T13:28:27.250317+00:00"
2/16/2026, 1:28:27 PM
model
"openai/gpt-5-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4094
moderation_latency
(null)
generation_time
32639
tokens_prompt
46
tokens_completion
941
native_tokens_prompt
41
native_tokens_completion
2545
native_tokens_completion_images
0
native_tokens_reasoning
2240
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
0.02550125
router
(null)
provider_responses
0
id
"resp_03e43e1f13bb87860169931b5a102081978bb0baa980743929"
status
200
is_byok
false
latency
159
endpoint_id
"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-2025-08-07"
api_type
"completions"
id
"gen-1771248474-ETN8BdafS2WENv90wK4t"
upstream_id
"resp_03e43e1f13bb87860169931b5a102081978bb0baa980743929"
total_cost
0.02550125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
96.0653%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
20
1
20
2
21
3
20
4
20
5
20
6
20
7
20
8
20
9
20