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Run: 2026-03-09-01KK9PTCX0HQHKWQ97RB79M5BZ
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
10.3s
Cost:
$0.009598
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 needled the manor windows as midnight swallowed Blackthorn Hall. Inside, candles trembled beside portraits whose eyes accused every guest. Evelyn Marsh heard a scream, then silence, sharp and unnatural. She followed the echo downstairs, clutching her father's silver lighter. The library door stood open, breathing smoke and ruined secrets. On the Persian rug lay Augustus Vale, bloodied, sightless, motionless. Pinned beneath his hand, a chess king glimmered like evidence. Somewhere above, a clock struck one, and someone quietly laughed.
created_at
"2026-03-09T16:27:55.181Z"
3/9/2026, 4:27:55 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9584
moderation_latency
(null)
generation_time
9593
tokens_prompt
46
tokens_completion
429
native_tokens_prompt
41
native_tokens_completion
633
native_tokens_completion_images
0
native_tokens_reasoning
516
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
0.0095975
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_072b6af76d1630520169aef50b41d08197a6339f2214015946"
is_byok
false
latency
166
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-1773073675-d1Bvw671ueh9Zt1zjvTd"
upstream_id
"resp_072b6af76d1630520169aef50b41d08197a6339f2214015946"
total_cost
0.0095975
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
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10