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Run: 2026-03-18-01KM09S2H89T4E9SHJHTHEY2Y9
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
11.2s
Cost:
$0.006614
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 stitched silver lines across Blackthorn Manor as midnight swallowed the gardens, and the last guests whispered toward the ballroom. Inside, chandeliers trembled above polished floors, where candlelight shivered over portraits, and everyone avoided the grand staircase as if cursed. Detective Mara Venn arrived late, carrying wet newspapers and a patience already frayed by the constable's cryptic summons outside tonight. At the center of the room, Sir Alistair's champagne glass lay shattered beside his body, still warm to the touch. No one admitted hearing the shot, though the open window breathed in storm air and the scent of garden roses. Mara noticed three things: the missing watch, the ash on the carpet, and the smile on the dead man's face.
created_at
"2026-03-18T11:02:32.246Z"
3/18/2026, 11:02:32 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10801
moderation_latency
(null)
generation_time
11032
tokens_prompt
46
tokens_completion
562
native_tokens_prompt
41
native_tokens_completion
1463
native_tokens_completion_images
0
native_tokens_reasoning
1307
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
0.00661425
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_01d4a0c54b5877f40169ba8648564081939c11c2d646547c93"
is_byok
false
latency
329
model_permaslug
"openai/gpt-5.4-mini-20260317"
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-1773831752-10DBehuGtR6rgXj0s2Ex"
upstream_id
"resp_01d4a0c54b5877f40169ba8648564081939c11c2d646547c93"
total_cost
0.00661425
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