Run: 2026-03-18-01KM09PBKPYBF6QSGA96977Y89

Run Details

Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
2.1s
Cost:
$0.000143
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
74.99% 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 Maren faces a quiet dawn. Beneath stained glass, Lady Harlow lies. Her jeweled brooch gleams coldly nearby. The house holds guests, trembling softly inside. Four suspects stand around silent evidence. Maren notes the locked east wing. A distant clock ticks, growing louder. Footprints vanish where snow begins. The butler swears he heard nothing. The doctor finds no pulse. Maren opens her case, searching motives.
created_at"2026-03-18T11:01:03.237Z" 3/18/2026, 11:01:03 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1319
moderation_latency(null)
generation_time1732
tokens_prompt46
tokens_completion119
native_tokens_prompt41
native_tokens_completion108
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"
usage0.0001432
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_06bd2391b6b671300169ba85ef7a088193aca1c08fb2c0ba1d"
is_byokfalse
latency395
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-1773831663-eOFf3fv0b8juz6jBiupp"
upstream_id"resp_06bd2391b6b671300169ba85ef7a088193aca1c08fb2c0ba1d"
total_cost0.0001432
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
74.99% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
06
16
26
37
46
56
66
75
86
95
106