NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-18-01KM091TF9WM1N44R15FVYBXPB
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.8s
Cost:
$0.004828
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 silver threads across Blackmere Manor as Inspector Vale climbed the steps, noticing one upstairs window glowing red still. Inside, servants stood frozen beside the chandelier, while Mrs. Blackmere whispered that her husband had vanished during dinner upstairs tonight. Vale followed blood droplets along the corridor, each bead reflecting portraits whose painted eyes seemed strangely accusatory in the dimness. At the library door, he found the body, seated upright, a letter opener buried beneath the ribs like an accusation. On the desk, a chessboard waited with missing pieces, and beside it lay a note signed only, “Checkmate,” in red.
created_at
"2026-03-18T10:49:50.325Z"
3/18/2026, 10:49:50 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4483
moderation_latency
(null)
generation_time
4666
tokens_prompt
46
tokens_completion
172
native_tokens_prompt
41
native_tokens_completion
1066
native_tokens_completion_images
0
native_tokens_reasoning
936
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
0.00482775
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_05ccfdb152e0bc460169ba834e62788194b87efcea32ef5527"
is_byok
false
latency
231
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-1773830990-7DfueMkedFMXM32UqumM"
upstream_id
"resp_05ccfdb152e0bc460169ba834e62788194b87efcea32ef5527"
total_cost
0.00482775
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20