Run: 2026-03-18-01KM07MDNGTXTF304V93F01QWA

Run Details

Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
3.8s
Cost:
$0.000991
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 smeared Harbor lights tonight. Detective Quinn heard a scream. Behind warehouses, a body lay. Silence hung, broken by sirens. Dr. Lorne knelt, examining bruises. Mara noted the victim's ring. It bore initials, oddly polished. Captain Reyes ordered everyone stay. The night watchman kept trembling. He swore he saw nothing. Yet footprints circled the crime. Mara smelled smoke and sea-salt.
created_at"2026-03-18T10:25:02.654Z" 3/18/2026, 10:25:02 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3552
moderation_latency(null)
generation_time3677
tokens_prompt46
tokens_completion113
native_tokens_prompt41
native_tokens_completion786
native_tokens_completion_images0
native_tokens_reasoning677
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"
usage0.0009907
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0b3143ec66b823e10169ba7d7eb6e88197bef19de80e69a97f"
is_byokfalse
latency180
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-1773829502-yX0STkLb5n5T5WFc9t5K"
upstream_id"resp_0b3143ec66b823e10169ba7d7eb6e88197bef19de80e69a97f"
total_cost0.0009907
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115