Run: 2026-03-18-01KM09SM5EKH8S5F9A9VR2KQ0V

Run Details

Duration:
1.9s
Cost:
$0.000186
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
84.45% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Midnight fell; rain tapped the manor windows like impatient fingers. Detective Lorna Vale arrived, hearing screams from the sealed library. Lady Hartwell lay still beside the shattered grandfather clock. Candles burned low, yet the room smelled faintly scorched. Guests whispered, claiming thunder struck, though no storms approached. The butler swore innocence, clutching keys to every door. On the floor, a torn note bore a single initial. Lorna examined ash smudges, finding no match among household records. The housekeeper cried, insisting her son vanished hours earlier. Outside, a carriage departed silently, leaving mud trails behind.
created_at"2026-03-18T11:02:50.297Z" 3/18/2026, 11:02:50 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1110
moderation_latency(null)
generation_time1812
tokens_prompt46
tokens_completion172
native_tokens_prompt41
native_tokens_completion142
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"
usage0.0001857
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_00608cffceda86da0169ba865a5bfc8194924ee15291589efd"
is_byokfalse
latency217
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-1773831770-3WwfCjjJmt1QWVP0smB9"
upstream_id"resp_00608cffceda86da0169ba865a5bfc8194924ee15291589efd"
total_cost0.0001857
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
84.45% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
29
39
49
59
610
710
89
99