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Run: 2026-03-18-01KM09TN6NHJDEHC97A4VZ5QGT
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.7s
Cost:
$0.004292
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched the town square into silver threads as Detective Mara Vale approached the mansion, already smelling money and fear. A bell tolled inside, though the front doors stood open, and a woman in black waited beside a shattered vase. She did not introduce herself, only pointed at the staircase where crimson droplets climbed the banister like deliberate punctuation marks. Mara crouched, touched the nearest drop, and felt the wet certainty of fresh violence beneath the mansion's expensive perfume there. From the ballroom came a single scream, abruptly cut short, and every guest turned toward the darkened archway at once. Mara rose slowly, because murders rarely announced themselves this neatly, and someone in the house was still pretending innocence tonight.
created_at
"2026-03-18T11:03:24.131Z"
3/18/2026, 11:03:24 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10371
moderation_latency
(null)
generation_time
10549
tokens_prompt
46
tokens_completion
457
native_tokens_prompt
41
native_tokens_completion
947
native_tokens_completion_images
0
native_tokens_reasoning
799
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
usage
0.00429225
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_069df379b119262d0169ba867c2ef88197b8df8cfe8a6c2c88"
is_byok
false
latency
187
model_permaslug
"openai/gpt-5.4-mini-20260317"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer
(null)
api_type
"completions"
id
"gen-1773831804-rH2shDl7Fvk6Pb5ACGOe"
upstream_id
"resp_069df379b119262d0169ba867c2ef88197b8df8cfe8a6c2c88"
total_cost
0.00429225
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20