Run: 2026-03-18-01KM09EWKQQ32JH8BF1B078X39

Run Details

Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.8s
Cost:
$0.001862
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the manor roof as Detective Vale arrived alone. Inside, candles trembled, casting long fingers across the marble hall. At the staircase, a butler whispered, "She was already dead." Vale noticed no footprints, only a crimson ribbon near portrait. The portrait's eyes seemed accusatory, watching everyone who lied tonight.
created_at"2026-03-18T10:56:58.499Z" 3/18/2026, 10:56:58 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5578
moderation_latency(null)
generation_time5692
tokens_prompt46
tokens_completion363
native_tokens_prompt41
native_tokens_completion407
native_tokens_completion_images0
native_tokens_reasoning331
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"
usage0.00186225
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_017f95ac6d518b600169ba84fa8eb08193a50ad49e0c2b4f81"
is_byokfalse
latency322
model_permaslug"openai/gpt-5.4-mini-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-1773831418-1qzyNlU5iJqf0kNY5bo3"
upstream_id"resp_017f95ac6d518b600169ba84fa8eb08193a50ad49e0c2b4f81"
total_cost0.00186225
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
010
110
210
310
410