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Run: 2026-03-06-01KK1GFHTT85KF3M51JNKFXBZ2
Run Details
Model:
GPT-5.4
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.5s
Cost:
$0.002112
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
94.24%
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 hammered Blackthorn Hall as mourners gathered beneath slate eaves. Candles trembled inside, casting saints and sinners into wavering gold. Lady Wren stood smiling, though yesterday her husband vanished mysteriously. The clock struck nine when thunder swallowed the butler's scream. Guests rushed ballroomward, silk whispering panic across the checkerboard floor. There, beneath crystal chandeliers, Lord Wren lay impossibly, freshly dead. A silver dagger glittered between ribs no physician could explain. His widow touched pearls, then murmured, "Someone here loved him murderously." Outside, the storm locked gates while secrets breathed behind every door.
created_at
"2026-03-06T12:03:12.867Z"
3/6/2026, 12:03:12 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
458
moderation_latency
(null)
generation_time
6419
tokens_prompt
46
tokens_completion
172
native_tokens_prompt
41
native_tokens_completion
134
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
0.0021125
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_013b2e74b0b0837b0169aac280ebf48196ba03bba00109940c"
is_byok
false
latency
154
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-1772798592-ZTKgpeWeUwI6kNdgPCXz"
upstream_id
"resp_013b2e74b0b0837b0169aac280ebf48196ba03bba00109940c"
total_cost
0.0021125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
94.24%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
11
8
11