Run: 2026-03-09-01KK9QP4Y3PWVX2JEW6FJTXSQV

Run Details

Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
10.7s
Cost:
$0.005533
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. Midnight pressed against the eaves. Guests whispered beneath chandelier shadows. Then the clock struck thirteen. Lady Harrow dropped her glass. Red bloomed across white satin. No one heard the gunshot. The violinist kept bowing softly. Only the butler saw movement. Someone smiled behind the curtains.
created_at"2026-03-09T16:43:04.523Z" 3/9/2026, 4:43:04 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10387
moderation_latency(null)
generation_time10591
tokens_prompt46
tokens_completion324
native_tokens_prompt41
native_tokens_completion362
native_tokens_completion_images0
native_tokens_reasoning279
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"
usage0.0055325
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_047704cb9fd8f91f0169aef898a22481939b9fcb45c72ae930"
is_byokfalse
latency230
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-1773074584-K6yvU1y4OpfeDik7KZeK"
upstream_id"resp_047704cb9fd8f91f0169aef898a22481939b9fcb45c72ae930"
total_cost0.0055325
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