Run: 2026-03-18-01KM09KJCHNASKR92A2MH94R3Y

Run Details

Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1.1s
Cost:
$0.000137
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
77.88% Matches word count (details)

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
Detective Mara Vale arrived at dawn. A gala bell rang, then silence. Wealthy hostess Lysa died beside fountains. No witnesses spoke, curtains stayed drawn. Murder weapon vanished, yet perfume lingered. Guests trembled under chandeliers, eyes darting. The coroner found bruises near throat. Mara noted locked doors, unbroken seals. A servant swore keys were missing. In the ballroom, candles burned backward.
created_at"2026-03-18T10:59:31.87Z" 3/18/2026, 10:59:31 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency442
moderation_latency(null)
generation_time975
tokens_prompt46
tokens_completion113
native_tokens_prompt41
native_tokens_completion103
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"
usage0.00013695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_014e56409d9941b50169ba8593ee848190927f5bf508b849b0"
is_byokfalse
latency178
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-1773831571-YGgfoS6VvxLoHH146qn1"
upstream_id"resp_014e56409d9941b50169ba8593ee848190927f5bf508b849b0"
total_cost0.00013695
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
77.88% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
06
16
26
36
46
56
66
76
86
96