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Run: 2026-03-06-01KK1H84GSC5C672NZY43RSW0Z
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.2s
Cost:
$0.001618
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
68.55%
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 needled the mansion windows as guests gathered silently, their reflections wavering like ghosts across the polished black marble floor. At precisely midnight, the chandelier flickered once, and the host collapsed forward, crimson blooming through his immaculate dinner jacket. No one screamed immediately; shock held every throat shut while thunder rolled above, as though heaven itself had witnessed murder. Inspector Vale arrived moments later, removing wet gloves carefully, already noting alibis dissolving faster than raindrops on candles.
created_at
"2026-03-06T12:16:38.436Z"
3/6/2026, 12:16:38 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
464
moderation_latency
(null)
generation_time
3107
tokens_prompt
46
tokens_completion
140
native_tokens_prompt
41
native_tokens_completion
101
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
0.0016175
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0e443a097e4236710169aac5a68224819395806875aeeceffb"
is_byok
false
latency
173
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-1772799398-Q1aCqu1DxTMQDF4GRBuC"
upstream_id
"resp_0e443a097e4236710169aac5a68224819395806875aeeceffb"
total_cost
0.0016175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
68.55%
Matches word count
n/a
neededClean
false
sentences
4
wordCounts
0
20
1
19
2
20
3
18