Run: 2026-03-18-01KM09S0DNW3XEG33F3REK5M6C

Run Details

Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
14.1s
Cost:
$0.001337
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
Night draped the harbor silently. Detective Mara Quinn arrived dawn. A fisherman found him, face-down. Police tape circled shattered pier. Mara noted salt clinging wounds. Victim wore counterfeit ring tonight. Across palm, wax seal remained. Mara asked dockworkers of midnight. Guilt shimmered in trembling witnesses. Shadows hid a violinist suddenly.
created_at"2026-03-18T11:02:30.079Z" 3/18/2026, 11:02:30 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13551
moderation_latency(null)
generation_time13639
tokens_prompt46
tokens_completion570
native_tokens_prompt41
native_tokens_completion1063
native_tokens_completion_images0
native_tokens_reasoning973
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"
usage0.00133695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_081a4221ac37b42f0169ba864625948193bb3500d3680c3ddb"
is_byokfalse
latency205
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-1773831750-Xob41LrpdmmpWzDwxzgK"
upstream_id"resp_081a4221ac37b42f0169ba864625948193bb3500d3680c3ddb"
total_cost0.00133695
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