Run: 2026-03-18-01KM09M7N0PKQFY9Y2QVHA3P4X

Run Details

Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1.1s
Cost:
$0.000141
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
The clock struck midnight in silence. Candles flickered inside velvet shadows tonight. Detective Mara Voss arrived at Quinn. A scream echoed from the manor. Sirens far away faded into darkness. The victim lay still, face down. Dr. Hale examined bruises without hesitation. Constables sealed doors, leaving no exits. Mara noted peculiar wet footprints nearby. The butler wept, clutching trembling hands. Everyone waited for answers from Mara.
created_at"2026-03-18T10:59:53.647Z" 3/18/2026, 10:59:53 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency447
moderation_latency(null)
generation_time1003
tokens_prompt46
tokens_completion123
native_tokens_prompt41
native_tokens_completion106
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"
usage0.0001407
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_023ddb2f94e20bf80169ba85a9b47c8190a7e64ae91ea2f114"
is_byokfalse
latency179
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-1773831593-3oDsDp48EuN1REeLJxj2"
upstream_id"resp_023ddb2f94e20bf80169ba85a9b47c8190a7e64ae91ea2f114"
total_cost0.0001407
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
77.88% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
06
16
26
36
46
56
66
76
86
96
106