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Run: 2026-03-06-01KK1HFA9RTWXACRGHYN7BQ5SV
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
4.4s
Cost:
$0.002172
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 rattled Blackthorn Manor while guests whispered around silver candles. At midnight, the clock stuttered, then swallowed every hopeful sound. Lady Harrow entered laughing, her emerald necklace bright against velvet. Moments later, a scream tore sharply through the candlelit gallery. We found her crumpled beneath the portrait of smiling ancestors. The necklace was gone, and blood jeweled her pale throat. No window stood open, and every door remained bolted inside. Yet among the ashes, someone had left fresh lavender petals. Inspector Vale arrived silently, removing gloves with meticulous, mournful care. He studied our faces, then announced, "One among you lies."
created_at
"2026-03-06T12:20:33.728Z"
3/6/2026, 12:20:33 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
487
moderation_latency
(null)
generation_time
4326
tokens_prompt
46
tokens_completion
175
native_tokens_prompt
41
native_tokens_completion
138
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
0.0021725
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_04bddbc9d87249180169aac691cb9c8193ba208aca70a75aa1"
is_byok
false
latency
172
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-1772799633-EczSJj89ZAMjtNMqVqsr"
upstream_id
"resp_04bddbc9d87249180169aac691cb9c8193ba208aca70a75aa1"
total_cost
0.0021725
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