Run: 2026-03-18-01KM090FYY9Z1T7E1AEZ4WKWNK

Run Details

Model:
GPT-5.4 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
946ms
Cost:
$0.000386
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
97.79% 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 stitched the manor windows shut. Tonight, everyone smiled too carefully. The chandelier trembled above silence. Nora found the blood first. It pooled beneath grandfather clock. Someone had murdered Mr. Vale. His watch still ticked loudly. All eyes turned toward Nora. She hadn't touched the body. Yet her hands were red.
created_at"2026-03-18T10:49:06.794Z" 3/18/2026, 10:49:06 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency500
moderation_latency(null)
generation_time876
tokens_prompt46
tokens_completion93
native_tokens_prompt41
native_tokens_completion79
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00038625
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0e4f3e20d8e5304e0169ba8322dc64819686f03adcf88d84d9"
is_byokfalse
latency290
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-1773830946-Wig9P3fOwGhJOYHPZGxs"
upstream_id"resp_0e4f3e20d8e5304e0169ba8322dc64819686f03adcf88d84d9"
total_cost0.00038625
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
97.79% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
06
15
25
35
45
55
65
75
85
95