Run: 2026-03-18-01KM0A8GZE6DF791SA9W8T91NG

Run Details

Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
6.2s
Cost:
$0.000468
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 hissed on Ashford Manor. Detective Lila Marlowe arrived, late. A chandelier flickered above bodies. Only one victim breathed quietly. Dr. Fen showed bruises, grimly. Butler swore he saw nothing. Footprints vanished toward the library. Marlowe pocketed a snapped watch.
created_at"2026-03-18T11:10:58.555Z" 3/18/2026, 11:10:58 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6019
moderation_latency(null)
generation_time6104
tokens_prompt46
tokens_completion236
native_tokens_prompt41
native_tokens_completion368
native_tokens_completion_images0
native_tokens_reasoning289
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"
usage0.0004682
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_094b2fc4496db1900169ba8842a1288195bbb5b201edb0a776"
is_byokfalse
latency220
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-1773832258-QElW618tXqakUCYTlwNk"
upstream_id"resp_094b2fc4496db1900169ba8842a1288195bbb5b201edb0a776"
total_cost0.0004682
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
05
15
25
35
45
55
65
75