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Run: 2026-03-09-01KKACB2T1Q64STXDY16922ABW
Run Details
Model:
GPT-5.4 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
17.5s
Cost:
$0.017593
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 hammered Blackthorn Hall as Inspector Vale arrived, his lantern trembling, while somewhere above, a woman screamed once, then stopped. The butler opened the door already gloved in blood, whispering that dinner had ended abruptly when Lady Harrow died tonight. Inside, twelve guests stood motionless around silver candlesticks, their faces pale masks reflecting lightning and the accusing portrait's stare above. Lady Harrow lay beneath the grandfather clock, emerald necklace broken, one slipper missing, and a chess queen clenched tightly there. Vale noted the locked windows, the undisturbed dust, and the smell of lilacs drifting strangely from the library door nearby. When the clock began striking thirteen, every mourner flinched except the vicar, who smiled as though recognizing fate at once.
created_at
"2026-03-09T22:44:01.998Z"
3/9/2026, 10:44:01 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
16499
moderation_latency
(null)
generation_time
17441
tokens_prompt
46
tokens_completion
508
native_tokens_prompt
41
native_tokens_completion
1166
native_tokens_completion_images
0
native_tokens_reasoning
1002
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
0.0175925
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0df1127389d2bb540169af4d3210cc81959502da6608e4c9fd"
is_byok
false
latency
146
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-1773096241-vFTMN5UvvsqTfM8f0FWu"
upstream_id
"resp_0df1127389d2bb540169af4d3210cc81959502da6608e4c9fd"
total_cost
0.0175925
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