Run: 2026-03-18-01KM08TMHGVF8MB8J61Q883G6Q

Run Details

Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
4.1s
Cost:
$0.000437
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 tapped mansion windows softly. Detective Hale arrived before dawn. A servant found the body. In the study, papers scattered. Victim's eyes stared toward portraits. A dagger lay beside ink. Lydia's alibi sounded carefully prepared. Murderers always return to silence.
created_at"2026-03-18T10:45:54.875Z" 3/18/2026, 10:45:54 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3884
moderation_latency(null)
generation_time3964
tokens_prompt46
tokens_completion217
native_tokens_prompt41
native_tokens_completion343
native_tokens_completion_images0
native_tokens_reasoning273
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"
usage0.00043695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_01c01bac107ffd040169ba8262f4a081938f9f1c6032d0dfb0"
is_byokfalse
latency198
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-1773830754-dmV10wEBOpUu55u9ozwx"
upstream_id"resp_01c01bac107ffd040169ba8262f4a081938f9f1c6032d0dfb0"
total_cost0.00043695
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
05
15
25
35
45
55
65
75