Run: 2026-03-18-01KM07E9ZC02K285EPN6CR9TX8

Run Details

Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
5.7s
Cost:
$0.001241
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 rasped windows over Harbor. Detective Mara Quinn entered mansion. Servants whispered where silence tightened. A clock ticked, marking midnight. In the study, Bram lay. Blood cooled beside shattered glass. Quinn found a torn glove. The glove smelled of lilacs. Only one window showed footprints. Quinn asked, 'Who touched Bram?' House answered with distant thunder.
created_at"2026-03-18T10:21:42.264Z" 3/18/2026, 10:21:42 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5513
moderation_latency(null)
generation_time5618
tokens_prompt46
tokens_completion105
native_tokens_prompt41
native_tokens_completion986
native_tokens_completion_images0
native_tokens_reasoning893
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"
usage0.0012407
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0b1769842476b5600169ba7cb653348195b8dd736387c509cf"
is_byokfalse
latency185
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-1773829302-53hFwjE98MNtW6CA5LZh"
upstream_id"resp_0b1769842476b5600169ba7cb653348195b8dd736387c509cf"
total_cost0.0012407
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
05
15
25
35
45
55
65
75
85
95
105