Run: 2026-03-18-01KM09BHRA55NHQF8ZJH82WB61

Run Details

Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
8.4s
Cost:
$0.000754
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 masked silent pier tracks. Detective Mara arrived before dawn. Fisherman pointed at broken nets. Captain Ellery lay cold, lifeless. Doctor Sato checked victim pulse. Mara noticed salt-glitter on glass. Beside a torn glove waited. Someone whispered, 'No one saw.'
created_at"2026-03-18T10:55:09.078Z" 3/18/2026, 10:55:09 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8111
moderation_latency(null)
generation_time8252
tokens_prompt46
tokens_completion351
native_tokens_prompt41
native_tokens_completion597
native_tokens_completion_images0
native_tokens_reasoning523
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"
usage0.00075445
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_068a553a114a73e50169ba848d2e3c81909b2437eea706f5ff"
is_byokfalse
latency248
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-1773831309-6USTKOOnTD0iJdBs3FZ3"
upstream_id"resp_068a553a114a73e50169ba848d2e3c81909b2437eea706f5ff"
total_cost0.00075445
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