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Run: 2026-03-06-01KK1GY8QV2G1ZKSSV1R06RFTD
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.1s
Cost:
$0.002188
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain battered Blackthorn Hall as mourners gathered beneath bruised skies. Candles trembled wildly, casting nervous halos across ancestral portraits tonight. At precisely midnight, the grandfather clock swallowed its thirteenth chime. Lady Wren descended silently, her veil glistening like fresh cobwebs. No one noticed the blood staining her left ivory glove. She raised a crystal glass, proposing remembrance, forgiveness, and reconciliation. Then the library doors slammed shut without any visible hand. Somewhere upstairs, a woman screamed once, sharply, then not again. The guests froze, listening as footsteps crossed the ceiling overhead. When the lights failed, someone laughed softly beside the corpse.
created_at
"2026-03-06T12:11:15.074Z"
3/6/2026, 12:11:15 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
556
moderation_latency
(null)
generation_time
6074
tokens_prompt
46
tokens_completion
185
native_tokens_prompt
41
native_tokens_completion
139
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.0021875
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_07f978d357c1d08b0169aac46321bc8197b8a7388182b0b7f1"
is_byok
false
latency
142
model_permaslug
"openai/gpt-5.4-20260305"
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-1772799075-iP8DPEJ2bngNOh9Bmmpy"
upstream_id
"resp_07f978d357c1d08b0169aac46321bc8197b8a7388182b0b7f1"
total_cost
0.0021875
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10