Run: 2026-03-09-01KK9PSKQAH5XFSBMY5909GVDF

Run Details

Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
10.5s
Cost:
$0.006162
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 worried the mansion windows. Guests whispered beneath trembling chandeliers. Midnight arrived with a scream. Lady Harrow collapsed beside dessert. Her pearls scattered like teeth. Someone laughed, then quickly stopped. The butler locked every door. Inspector Vale noticed crimson frosting. One candle guttered over silence. Nothing moved except guilty eyes.
created_at"2026-03-09T16:27:29.568Z" 3/9/2026, 4:27:29 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9916
moderation_latency(null)
generation_time10037
tokens_prompt46
tokens_completion367
native_tokens_prompt41
native_tokens_completion404
native_tokens_completion_images0
native_tokens_reasoning323
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"
usage0.0061625
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0ac08e3789e943960169aef4f1c5788196b89294518312e9f5"
is_byokfalse
latency250
model_permaslug"openai/gpt-5.4-20260305"
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-1773073649-prg2lXNu0OHknGNYx2zO"
upstream_id"resp_0ac08e3789e943960169aef4f1c5788196b89294518312e9f5"
total_cost0.0061625
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
05
15
25
35
45
55
65
75
85
95