Run: 2026-02-16-01KHK96BXD2P7QBFNNRHYQTAFH

Run Details

Duration:
27.6s
Cost:
$0.012321
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
Rain hammered the glass-paned conservatory. Detective Mara Quinn studied everything. The party had ended violently. Crystal shards glittered beside bodies. Music still played, eerily cheery. The host lay dead center. Scarlet wine soaked his tuxedo. No glass near his hand. But blood rimmed his lips. Guests huddled, whispering, avoiding her. Mara noticed one missing cufflink. The other gleamed under piano. She knelt, examining the keys. Middle C was smeared crimson. Someone had played while dying. Or after, Mara thought, colder. Outside, sirens wailed through fog. Inside, a clock chimed midnight. Everyone claimed simultaneous alibis, impossibly. Yet someone had locked doors. Windows were latched from within. The conservatory skylight showed rain. No footprints marked the soil. Mara smelled cordite, faint, lingering. The gun was missing entirely. She addressed the shaking guests. Nobody moved toward the exit. Lightning flashed, bleaching every face. In that instant, Mara decided. The killer remained among them.
created_at"2026-02-16T13:11:15.919198+00:00" 2/16/2026, 1:11:15 PM
model"openai/gpt-5.1-20251113"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5465
moderation_latency(null)
generation_time27375
tokens_prompt46
tokens_completion830
native_tokens_prompt41
native_tokens_completion1227
native_tokens_completion_images0
native_tokens_reasoning970
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"
usage0.01232125
router(null)
provider_responses
0
id"resp_018be7c380d380c4016993175810d881969aaab4680e5d4264"
status200
is_byokfalse
latency146
endpoint_id"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.1-20251113"
api_type"completions"
id"gen-1771247447-Ztgoon6IkHCTfCegnZjT"
upstream_id"resp_018be7c380d380c4016993175810d881969aaab4680e5d4264"
total_cost0.01232125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
99.2627% Matches word count n/a
neededCleanfalse
sentences30
wordCounts
06
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
265
275
285
295