Run: 2026-03-18-01KM07HJAGAWTBG76PKW2YHD61

Run Details

Duration:
1.1s
Cost:
$0.000182
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
0.75% Matches word count (details)

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

AI
The mansion’s veranda glimmered with dawn light as Inspector Hale arrived to greet the grieving assembly below. Inside, the air smelled of roses, wax, and fear, while servants kept whispering about last night’s argument. Mrs. Ellery insisted her husband slept peacefully, yet a carriage clock stopped precisely at midnight. Dr. Rowan examined the study carefully, noting no forced entry, no missing keys, and one overturned chair. Then a scream cut through silence, and every guest turned toward the library door, locked from within. Hale stepped forward, lifting the brass latch, and found Albert Ellery sprawled beside his desk, lifeless.
created_at"2026-03-18T10:23:29.116Z" 3/18/2026, 10:23:29 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency454
moderation_latency(null)
generation_time1018
tokens_prompt46
tokens_completion168
native_tokens_prompt41
native_tokens_completion139
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00018195
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_05fc2205c4cab2ef0169ba7d212c0481979090615ef7c07503"
is_byokfalse
latency192
model_permaslug"openai/gpt-5.4-nano-20260317"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773829409-VMwQ2zRyRSvFRG2TGItO"
upstream_id"resp_05fc2205c4cab2ef0169ba7d212c0481979090615ef7c07503"
total_cost0.00018195
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
0.75% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
017
117
215
317
417
516