Run: 2026-03-18-01KM07S6DEF5JDG80NRAD7VM92

Run Details

Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.3s
Cost:
$0.000689
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 tapped the manor windows as guests gathered for midnight. Detective Mara Voss arrived, coat dripping, eyes searching shadows tonight. The host announced festivities, then footsteps halted near the door. Inside, Emil Hart lay still, blood cooling beneath candelabra quietly. Guests murmured, while Voss noticed a key missing from rings. A violin played softly, masking screams as lanterns flickered violently.
created_at"2026-03-18T10:27:39.067Z" 3/18/2026, 10:27:39 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7082
moderation_latency(null)
generation_time7162
tokens_prompt46
tokens_completion420
native_tokens_prompt41
native_tokens_completion545
native_tokens_completion_images0
native_tokens_reasoning453
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"
usage0.00068945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0336c0ff0ead4de30169ba7e1b23408193a7ad3d7667aea509"
is_byokfalse
latency195
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-1773829659-XNykLSa9TaCC3AGqDZcT"
upstream_id"resp_0336c0ff0ead4de30169ba7e1b23408193a7ad3d7667aea509"
total_cost0.00068945
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
010
110
210
310
410
510