Run: 2026-03-18-01KM07RZRW2SRZC6RE1M0BRYN8

Run Details

Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
2.0s
Cost:
$0.000424
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% 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
Rain slicked cobblestones outside Graymere. The host found Lucas dead. No witnesses dared speak tonight. Detective Mara arrived with lanterns. A locked study echoed arguments. Beneath his chair, a knife.
created_at"2026-03-18T10:27:32.266Z" 3/18/2026, 10:27:32 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1860
moderation_latency(null)
generation_time1931
tokens_prompt46
tokens_completion57
native_tokens_prompt41
native_tokens_completion333
native_tokens_completion_images0
native_tokens_reasoning277
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"
usage0.00042445
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0f59090d9b9e855e0169ba7e1452788193a2d675ca3fc6154b"
is_byokfalse
latency189
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-1773829652-Y6x3FxUG3fHhTJhhUIVe"
upstream_id"resp_0f59090d9b9e855e0169ba7e1452788193a2d675ca3fc6154b"
total_cost0.00042445
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
05
15
25
35
45
55